/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:27:46,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:27:46,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:27:46,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:27:46,882 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 [2021-06-05 23:27:46,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:27:46,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:27:46,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:27:46,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:27:46,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:27:46,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:27:46,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:27:46,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:27:46,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:27:46,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:27:46,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:27:46,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:27:46,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:27:46,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:27:46,899 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:27:46,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:27:46,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:27:47,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:27:47,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:27:47,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:27:47,122 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:27:47,123 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:27:47,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-06-05 23:27:47,124 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-06-05 23:27:47,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:27:47,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:27:47,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:27:47,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:27:47,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:27:47,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:27:47,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:27:47,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:27:47,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:27:47,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/1) ... [2021-06-05 23:27:47,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:27:47,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:27:47,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:27:47,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:27:47,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (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 [2021-06-05 23:27:47,256 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:27:47,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:27:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:27:47,257 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:27:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:27:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:27:47,257 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:27:47,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:27:47,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:27:47,258 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:27:47,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:27:47,442 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:27:47,444 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:27:47 BoogieIcfgContainer [2021-06-05 23:27:47,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:27:47,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:27:47,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:27:47,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:27:47,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:47" (1/2) ... [2021-06-05 23:27:47,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@572702a7 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:27:47, skipping insertion in model container [2021-06-05 23:27:47,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:27:47" (2/2) ... [2021-06-05 23:27:47,449 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-06-05 23:27:47,452 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:27:47,452 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:27:47,452 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:27:47,453 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:27:47,502 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:27:47,515 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:27:47,544 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:27:47,544 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:27:47,544 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:27:47,544 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:27:47,544 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:27:47,545 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:27:47,545 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:27:47,545 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:27:47,550 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-05 23:27:47,574 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-05 23:27:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-05 23:27:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:27:47,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:47,580 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:47,580 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-06-05 23:27:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:47,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536631646] [2021-06-05 23:27:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:47,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:47,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536631646] [2021-06-05 23:27:47,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536631646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:47,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:47,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:27:47,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189130587] [2021-06-05 23:27:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:27:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:47,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:27:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:47,734 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:47,752 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-06-05 23:27:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:27:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:47,759 INFO L225 Difference]: With dead ends: 57 [2021-06-05 23:27:47,759 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 23:27:47,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 23:27:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-06-05 23:27:47,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-06-05 23:27:47,780 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-06-05 23:27:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:47,781 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-06-05 23:27:47,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-06-05 23:27:47,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:47,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:47,782 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:47,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:27:47,782 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-06-05 23:27:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:47,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000412110] [2021-06-05 23:27:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:47,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:47,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000412110] [2021-06-05 23:27:47,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000412110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:47,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859983502] [2021-06-05 23:27:47,838 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) [2021-06-05 23:27:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:27:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859983502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:48,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:48,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 23:27:48,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889489735] [2021-06-05 23:27:48,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:27:48,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:48,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:27:48,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:27:48,030 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:48,153 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-06-05 23:27:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:27:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:48,157 INFO L225 Difference]: With dead ends: 68 [2021-06-05 23:27:48,157 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 23:27:48,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 23:27:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-06-05 23:27:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 23:27:48,168 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-06-05 23:27:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:48,169 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 23:27:48,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 23:27:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:48,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:48,171 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:48,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 23:27:48,379 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:48,379 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-06-05 23:27:48,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:48,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874166065] [2021-06-05 23:27:48,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:48,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874166065] [2021-06-05 23:27:48,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874166065] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:48,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:48,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:27:48,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532565393] [2021-06-05 23:27:48,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:27:48,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:27:48,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:27:48,416 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:48,462 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-06-05 23:27:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:48,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:48,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:48,463 INFO L225 Difference]: With dead ends: 71 [2021-06-05 23:27:48,463 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 23:27:48,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 23:27:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-06-05 23:27:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-06-05 23:27:48,468 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-06-05 23:27:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:48,468 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-06-05 23:27:48,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-06-05 23:27:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:48,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:48,469 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:48,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:27:48,469 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:48,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-06-05 23:27:48,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:48,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233393943] [2021-06-05 23:27:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:48,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233393943] [2021-06-05 23:27:48,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233393943] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:48,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:48,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:27:48,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765357669] [2021-06-05 23:27:48,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:27:48,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:27:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:27:48,502 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:48,546 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-06-05 23:27:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:27:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:48,549 INFO L225 Difference]: With dead ends: 51 [2021-06-05 23:27:48,549 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 23:27:48,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 23:27:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-06-05 23:27:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-06-05 23:27:48,558 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-06-05 23:27:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:48,558 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-06-05 23:27:48,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-06-05 23:27:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:48,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:48,559 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:48,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:27:48,559 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:48,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-06-05 23:27:48,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:48,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014927913] [2021-06-05 23:27:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:48,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014927913] [2021-06-05 23:27:48,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014927913] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:48,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:48,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 23:27:48,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160000988] [2021-06-05 23:27:48,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:27:48,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:27:48,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:27:48,603 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:48,653 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-05 23:27:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:48,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:48,654 INFO L225 Difference]: With dead ends: 51 [2021-06-05 23:27:48,654 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 23:27:48,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:27:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 23:27:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-06-05 23:27:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-06-05 23:27:48,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-06-05 23:27:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:48,660 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-06-05 23:27:48,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-06-05 23:27:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:27:48,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:48,661 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:48,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:27:48,661 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-06-05 23:27:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:48,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733558677] [2021-06-05 23:27:48,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:48,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733558677] [2021-06-05 23:27:48,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733558677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:48,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654174389] [2021-06-05 23:27:48,789 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 [2021-06-05 23:27:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:48,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:27:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:48,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:48,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-06-05 23:27:48,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:48,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:48,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:48,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-05 23:27:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:49,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654174389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:49,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:27:49,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20251198] [2021-06-05 23:27:49,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:27:49,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:27:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:49,014 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:49,089 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 23:27:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:49,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:27:49,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:49,092 INFO L225 Difference]: With dead ends: 86 [2021-06-05 23:27:49,092 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 23:27:49,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 23:27:49,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-06-05 23:27:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-05 23:27:49,096 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-06-05 23:27:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:49,096 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-05 23:27:49,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-05 23:27:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:27:49,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:49,097 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:49,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:49,313 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-06-05 23:27:49,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:49,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007581128] [2021-06-05 23:27:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007581128] [2021-06-05 23:27:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007581128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542127078] [2021-06-05 23:27:49,375 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 [2021-06-05 23:27:49,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:27:49,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:49,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:49,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-06-05 23:27:49,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:49,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:49,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:49,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-05 23:27:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:49,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542127078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:49,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:27:49,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625012337] [2021-06-05 23:27:49,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:27:49,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:49,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:27:49,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:49,502 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-06-05 23:27:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:49,544 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-06-05 23:27:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:49,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 18 [2021-06-05 23:27:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:49,545 INFO L225 Difference]: With dead ends: 94 [2021-06-05 23:27:49,545 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 23:27:49,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 23:27:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-06-05 23:27:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-05 23:27:49,547 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-06-05 23:27:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:49,548 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-05 23:27:49,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-06-05 23:27:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-05 23:27:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:49,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:49,549 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:49,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:49,767 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:49,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:49,768 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-06-05 23:27:49,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:49,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312223468] [2021-06-05 23:27:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:49,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:49,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312223468] [2021-06-05 23:27:49,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312223468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197684072] [2021-06-05 23:27:49,817 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) [2021-06-05 23:27:49,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:27:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:49,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:49,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197684072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:49,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 23:27:49,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840690537] [2021-06-05 23:27:49,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:27:49,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:49,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:27:49,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:49,922 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-06-05 23:27:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:50,201 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-06-05 23:27:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:27:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 20 [2021-06-05 23:27:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:50,202 INFO L225 Difference]: With dead ends: 176 [2021-06-05 23:27:50,203 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 23:27:50,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:27:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 23:27:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-06-05 23:27:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-06-05 23:27:50,206 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-06-05 23:27:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:50,206 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-06-05 23:27:50,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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) [2021-06-05 23:27:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-06-05 23:27:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:50,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:50,207 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:50,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:50,423 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-06-05 23:27:50,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:50,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857131939] [2021-06-05 23:27:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:50,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:50,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857131939] [2021-06-05 23:27:50,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857131939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:50,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258346765] [2021-06-05 23:27:50,468 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 [2021-06-05 23:27:50,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:50,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:50,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258346765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:50,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:50,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:27:50,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243614774] [2021-06-05 23:27:50,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:50,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:50,590 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-06-05 23:27:50,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:50,858 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-06-05 23:27:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:27:50,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 20 [2021-06-05 23:27:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:50,860 INFO L225 Difference]: With dead ends: 219 [2021-06-05 23:27:50,860 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 23:27:50,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:27:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 23:27:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-06-05 23:27:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-06-05 23:27:50,864 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-06-05 23:27:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:50,864 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-06-05 23:27:50,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-06-05 23:27:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-06-05 23:27:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:50,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:50,865 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:51,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:51,080 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-06-05 23:27:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:51,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664699941] [2021-06-05 23:27:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:51,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:51,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664699941] [2021-06-05 23:27:51,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664699941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:51,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507153474] [2021-06-05 23:27:51,124 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 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 [2021-06-05 23:27:51,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:27:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:51,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507153474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:51,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:51,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 23:27:51,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563427870] [2021-06-05 23:27:51,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:51,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:51,232 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:51,492 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-06-05 23:27:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:27:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:51,495 INFO L225 Difference]: With dead ends: 208 [2021-06-05 23:27:51,495 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 23:27:51,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:27:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 23:27:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-05 23:27:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-06-05 23:27:51,499 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-06-05 23:27:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:51,499 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-06-05 23:27:51,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-06-05 23:27:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:51,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:51,500 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:51,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:51,713 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-06-05 23:27:51,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:51,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267651371] [2021-06-05 23:27:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:51,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267651371] [2021-06-05 23:27:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267651371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7616897] [2021-06-05 23:27:51,758 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 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 [2021-06-05 23:27:51,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:27:51,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:51,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7616897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:51,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:51,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 23:27:51,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390891063] [2021-06-05 23:27:51,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:51,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:51,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:51,867 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:52,105 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-06-05 23:27:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:27:52,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:52,106 INFO L225 Difference]: With dead ends: 205 [2021-06-05 23:27:52,106 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 23:27:52,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:27:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 23:27:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-06-05 23:27:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 23:27:52,109 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-06-05 23:27:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:52,110 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 23:27:52,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 23:27:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:52,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:52,110 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:52,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:52,321 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-06-05 23:27:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:52,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079241191] [2021-06-05 23:27:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:52,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079241191] [2021-06-05 23:27:52,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079241191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:52,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087193970] [2021-06-05 23:27:52,367 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 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 [2021-06-05 23:27:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:52,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087193970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:52,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:52,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:27:52,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170991281] [2021-06-05 23:27:52,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:52,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:52,474 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-06-05 23:27:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:52,739 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-06-05 23:27:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:27:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 20 [2021-06-05 23:27:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:52,741 INFO L225 Difference]: With dead ends: 300 [2021-06-05 23:27:52,741 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 23:27:52,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:27:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 23:27:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-06-05 23:27:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-06-05 23:27:52,746 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-06-05 23:27:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:52,746 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-06-05 23:27:52,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-06-05 23:27:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-06-05 23:27:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:52,747 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:52,747 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:52,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 23:27:52,956 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-06-05 23:27:52,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:52,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353652826] [2021-06-05 23:27:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:52,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:52,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353652826] [2021-06-05 23:27:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353652826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:52,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833245173] [2021-06-05 23:27:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:27:53,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:53,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:53,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:53,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833245173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:53,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:53,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 23:27:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261820371] [2021-06-05 23:27:53,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:53,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:53,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:53,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:53,091 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:53,318 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-06-05 23:27:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:27:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:53,319 INFO L225 Difference]: With dead ends: 238 [2021-06-05 23:27:53,319 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 23:27:53,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:27:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 23:27:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-06-05 23:27:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-06-05 23:27:53,324 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-06-05 23:27:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:53,324 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-06-05 23:27:53,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-06-05 23:27:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:53,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:53,325 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:53,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:53,541 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-06-05 23:27:53,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:53,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625381159] [2021-06-05 23:27:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:53,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625381159] [2021-06-05 23:27:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625381159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:53,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731044144] [2021-06-05 23:27:53,569 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 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 [2021-06-05 23:27:53,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:27:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:53,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731044144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:53,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:53,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 23:27:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489098982] [2021-06-05 23:27:53,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:53,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:53,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:53,670 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:53,886 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-06-05 23:27:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:27:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:53,887 INFO L225 Difference]: With dead ends: 302 [2021-06-05 23:27:53,887 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 23:27:53,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:27:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 23:27:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-06-05 23:27:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-06-05 23:27:53,892 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-06-05 23:27:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:53,892 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-06-05 23:27:53,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-06-05 23:27:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:53,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:53,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:54,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:54,101 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-06-05 23:27:54,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:54,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464605718] [2021-06-05 23:27:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:54,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464605718] [2021-06-05 23:27:54,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464605718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:54,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418561641] [2021-06-05 23:27:54,136 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 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 [2021-06-05 23:27:54,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:54,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:27:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418561641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:54,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:54,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:27:54,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653358069] [2021-06-05 23:27:54,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:54,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:54,257 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:54,480 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-06-05 23:27:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:27:54,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:54,482 INFO L225 Difference]: With dead ends: 302 [2021-06-05 23:27:54,482 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 23:27:54,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:27:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 23:27:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 23:27:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-05 23:27:54,486 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-06-05 23:27:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:54,486 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-05 23:27:54,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-05 23:27:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:54,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:54,487 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:54,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:27:54,701 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-06-05 23:27:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:54,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532409234] [2021-06-05 23:27:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:54,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532409234] [2021-06-05 23:27:54,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532409234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:54,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32673636] [2021-06-05 23:27:54,785 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 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 [2021-06-05 23:27:54,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:27:54,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:27:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:54,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:54,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:54,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 23:27:54,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:54,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:54,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:54,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 23:27:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:54,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32673636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:54,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:54,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:27:54,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715809486] [2021-06-05 23:27:54,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:54,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:54,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:54,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:54,980 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:55,094 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-06-05 23:27:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:55,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:55,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:55,095 INFO L225 Difference]: With dead ends: 282 [2021-06-05 23:27:55,095 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 23:27:55,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 23:27:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-06-05 23:27:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-06-05 23:27:55,103 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-06-05 23:27:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:55,103 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-06-05 23:27:55,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-06-05 23:27:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:55,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:55,103 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:55,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:27:55,317 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-06-05 23:27:55,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:55,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043475863] [2021-06-05 23:27:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:55,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:55,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043475863] [2021-06-05 23:27:55,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043475863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:55,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107306045] [2021-06-05 23:27:55,422 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 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 [2021-06-05 23:27:55,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:27:55,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:55,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:27:55,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:55,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:55,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:55,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:55,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 23:27:55,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:55,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:55,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:55,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 23:27:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:55,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107306045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:55,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:55,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:27:55,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953266788] [2021-06-05 23:27:55,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:55,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:55,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:55,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:55,568 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:55,660 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-06-05 23:27:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:55,661 INFO L225 Difference]: With dead ends: 256 [2021-06-05 23:27:55,661 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 23:27:55,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 23:27:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-06-05 23:27:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-06-05 23:27:55,666 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-06-05 23:27:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:55,666 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-06-05 23:27:55,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-06-05 23:27:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:55,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:55,667 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:55,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:27:55,883 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-06-05 23:27:55,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:55,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457819009] [2021-06-05 23:27:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:55,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:55,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457819009] [2021-06-05 23:27:55,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457819009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:55,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217238258] [2021-06-05 23:27:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:27:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:27:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:56,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:56,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 23:27:56,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:56,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:56,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:56,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 23:27:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:56,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217238258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:56,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:56,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:27:56,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072242549] [2021-06-05 23:27:56,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:56,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:56,154 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:56,262 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-06-05 23:27:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:56,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:56,263 INFO L225 Difference]: With dead ends: 301 [2021-06-05 23:27:56,264 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 23:27:56,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 23:27:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-06-05 23:27:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-06-05 23:27:56,271 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-06-05 23:27:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:56,272 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-06-05 23:27:56,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-06-05 23:27:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:56,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:56,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:56,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:56,485 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-06-05 23:27:56,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:56,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549133184] [2021-06-05 23:27:56,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:56,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549133184] [2021-06-05 23:27:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549133184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861709228] [2021-06-05 23:27:56,564 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 [2021-06-05 23:27:56,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:27:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:27:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:27:56,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 23:27:56,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:56,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:56,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:56,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 23:27:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:56,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861709228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:56,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:56,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:27:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687568188] [2021-06-05 23:27:56,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:56,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:56,690 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:56,818 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-06-05 23:27:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:56,820 INFO L225 Difference]: With dead ends: 320 [2021-06-05 23:27:56,820 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 23:27:56,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 23:27:56,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-06-05 23:27:56,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-06-05 23:27:56,825 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-06-05 23:27:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:56,825 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-06-05 23:27:56,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-06-05 23:27:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:27:56,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:56,826 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:57,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:57,026 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-06-05 23:27:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:57,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51635788] [2021-06-05 23:27:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:57,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:57,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51635788] [2021-06-05 23:27:57,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51635788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:57,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713187404] [2021-06-05 23:27:57,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:27:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:57,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:27:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:57,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713187404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:57,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:57,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 23:27:57,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293380335] [2021-06-05 23:27:57,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:27:57,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:57,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:27:57,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:57,216 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:57,620 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-06-05 23:27:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:27:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:27:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:57,622 INFO L225 Difference]: With dead ends: 495 [2021-06-05 23:27:57,622 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 23:27:57,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:27:57,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 23:27:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-06-05 23:27:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-06-05 23:27:57,627 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-06-05 23:27:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:57,627 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-06-05 23:27:57,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-06-05 23:27:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:27:57,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:57,628 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:57,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:57,841 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-06-05 23:27:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:57,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026980329] [2021-06-05 23:27:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:57,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026980329] [2021-06-05 23:27:57,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026980329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:57,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923980540] [2021-06-05 23:27:57,895 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 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 [2021-06-05 23:27:57,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:57,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:57,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:27:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:58,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923980540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:58,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:58,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:27:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29558870] [2021-06-05 23:27:58,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:58,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:58,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:58,033 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-06-05 23:27:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:58,572 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-06-05 23:27:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:27:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:27:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:58,574 INFO L225 Difference]: With dead ends: 696 [2021-06-05 23:27:58,574 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 23:27:58,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:27:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 23:27:58,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-06-05 23:27:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-06-05 23:27:58,582 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-06-05 23:27:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:58,582 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-06-05 23:27:58,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2021-06-05 23:27:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-06-05 23:27:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:27:58,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:58,583 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:58,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:27:58,789 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-06-05 23:27:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:58,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553455242] [2021-06-05 23:27:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:58,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:58,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553455242] [2021-06-05 23:27:58,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553455242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:58,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894341121] [2021-06-05 23:27:58,830 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 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 [2021-06-05 23:27:58,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:27:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:27:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:58,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894341121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:58,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:58,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 23:27:58,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858466228] [2021-06-05 23:27:58,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:27:58,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:58,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:27:58,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:58,971 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:59,438 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-06-05 23:27:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:27:59,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:27:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:59,440 INFO L225 Difference]: With dead ends: 654 [2021-06-05 23:27:59,441 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 23:27:59,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:27:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 23:27:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-06-05 23:27:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-06-05 23:27:59,448 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-06-05 23:27:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:59,449 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-06-05 23:27:59,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-06-05 23:27:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:27:59,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:59,449 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:59,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:27:59,665 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-06-05 23:27:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767323344] [2021-06-05 23:27:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:59,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:59,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767323344] [2021-06-05 23:27:59,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767323344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:59,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287764143] [2021-06-05 23:27:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:59,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:27:59,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:59,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:27:59,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:59,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287764143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:59,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:59,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 23:27:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184877235] [2021-06-05 23:27:59,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:27:59,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:59,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:27:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:59,856 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:00,213 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-06-05 23:28:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:28:00,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:00,215 INFO L225 Difference]: With dead ends: 539 [2021-06-05 23:28:00,215 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 23:28:00,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:28:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 23:28:00,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-06-05 23:28:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-06-05 23:28:00,222 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-06-05 23:28:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:00,222 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-06-05 23:28:00,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-06-05 23:28:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:00,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:00,222 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:00,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:28:00,423 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:00,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:00,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-06-05 23:28:00,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:00,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881268621] [2021-06-05 23:28:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:00,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881268621] [2021-06-05 23:28:00,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881268621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:00,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497208472] [2021-06-05 23:28:00,458 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 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 [2021-06-05 23:28:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:00,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497208472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:00,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:00,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 23:28:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494278253] [2021-06-05 23:28:00,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:28:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:28:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:28:00,586 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:00,902 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-06-05 23:28:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:28:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:00,912 INFO L225 Difference]: With dead ends: 593 [2021-06-05 23:28:00,912 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 23:28:00,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:28:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 23:28:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-06-05 23:28:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-06-05 23:28:00,919 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-06-05 23:28:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:00,919 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-06-05 23:28:00,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-06-05 23:28:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:00,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:00,920 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:01,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:28:01,133 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-06-05 23:28:01,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:01,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145665390] [2021-06-05 23:28:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:01,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:01,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145665390] [2021-06-05 23:28:01,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145665390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:01,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828534151] [2021-06-05 23:28:01,174 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 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 [2021-06-05 23:28:01,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:01,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:01,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:01,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:01,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828534151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:01,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:01,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 23:28:01,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276581813] [2021-06-05 23:28:01,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:28:01,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:01,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:28:01,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:28:01,317 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:28:01,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:01,767 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-06-05 23:28:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:28:01,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 [2021-06-05 23:28:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:01,769 INFO L225 Difference]: With dead ends: 701 [2021-06-05 23:28:01,769 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 23:28:01,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:28:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 23:28:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-06-05 23:28:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-06-05 23:28:01,782 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-06-05 23:28:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:01,782 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-06-05 23:28:01,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:28:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-06-05 23:28:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:01,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:01,783 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:01,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:28:01,999 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-06-05 23:28:01,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:01,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856182611] [2021-06-05 23:28:01,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:02,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856182611] [2021-06-05 23:28:02,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856182611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436630216] [2021-06-05 23:28:02,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:02,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:28:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:02,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436630216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:02,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:02,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:28:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268940846] [2021-06-05 23:28:02,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:02,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:02,173 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:02,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:02,584 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-06-05 23:28:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:28:02,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:02,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:02,586 INFO L225 Difference]: With dead ends: 817 [2021-06-05 23:28:02,586 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 23:28:02,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:28:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 23:28:02,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-06-05 23:28:02,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-06-05 23:28:02,594 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-06-05 23:28:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:02,594 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-06-05 23:28:02,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-06-05 23:28:02,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:02,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:02,595 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:02,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:02,812 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-06-05 23:28:02,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:02,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359417754] [2021-06-05 23:28:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:02,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:02,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359417754] [2021-06-05 23:28:02,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359417754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:02,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445978980] [2021-06-05 23:28:02,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:02,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:02,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:02,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:02,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445978980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:02,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:02,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 23:28:02,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113411230] [2021-06-05 23:28:02,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:28:02,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:28:02,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:28:02,987 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:28:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:03,331 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-06-05 23:28:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:28:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 [2021-06-05 23:28:03,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:03,333 INFO L225 Difference]: With dead ends: 578 [2021-06-05 23:28:03,333 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 23:28:03,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:28:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 23:28:03,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-06-05 23:28:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-06-05 23:28:03,339 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-06-05 23:28:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:03,339 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-06-05 23:28:03,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:28:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-06-05 23:28:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:03,340 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:03,340 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:03,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:28:03,553 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:03,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:03,553 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-06-05 23:28:03,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:03,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904620032] [2021-06-05 23:28:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:03,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:03,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904620032] [2021-06-05 23:28:03,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904620032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:03,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082651087] [2021-06-05 23:28:03,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:03,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:03,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:03,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082651087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:03,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:03,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 23:28:03,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327027148] [2021-06-05 23:28:03,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:28:03,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:03,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:28:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:28:03,727 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-06-05 23:28:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:04,169 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-06-05 23:28:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:28:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-06-05 23:28:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:04,172 INFO L225 Difference]: With dead ends: 943 [2021-06-05 23:28:04,172 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 23:28:04,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:28:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 23:28:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-06-05 23:28:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-06-05 23:28:04,182 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-06-05 23:28:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:04,182 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-06-05 23:28:04,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-06-05 23:28:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-06-05 23:28:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:04,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:04,183 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:04,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:04,397 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-06-05 23:28:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45529005] [2021-06-05 23:28:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:04,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:04,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45529005] [2021-06-05 23:28:04,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45529005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:04,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338310480] [2021-06-05 23:28:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:04,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:28:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:04,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338310480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:04,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:04,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 23:28:04,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987995534] [2021-06-05 23:28:04,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:28:04,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:28:04,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:28:04,557 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:04,893 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-06-05 23:28:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:28:04,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:04,896 INFO L225 Difference]: With dead ends: 910 [2021-06-05 23:28:04,896 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 23:28:04,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:28:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 23:28:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-06-05 23:28:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-06-05 23:28:04,905 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-06-05 23:28:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:04,906 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-06-05 23:28:04,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-06-05 23:28:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:04,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:04,907 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:05,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:28:05,122 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-06-05 23:28:05,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:05,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151822431] [2021-06-05 23:28:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:05,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151822431] [2021-06-05 23:28:05,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151822431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358218355] [2021-06-05 23:28:05,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:05,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358218355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:05,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:05,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 23:28:05,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598837952] [2021-06-05 23:28:05,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:28:05,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:05,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:28:05,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:28:05,278 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:28:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:05,625 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-06-05 23:28:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:28:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 [2021-06-05 23:28:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:05,628 INFO L225 Difference]: With dead ends: 997 [2021-06-05 23:28:05,628 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 23:28:05,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:28:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 23:28:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-06-05 23:28:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-06-05 23:28:05,638 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-06-05 23:28:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:05,638 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-06-05 23:28:05,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-06-05 23:28:05,639 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-06-05 23:28:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:05,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:05,640 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:05,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:05,853 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:05,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-06-05 23:28:05,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:05,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833687548] [2021-06-05 23:28:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:05,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833687548] [2021-06-05 23:28:05,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833687548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:05,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708370769] [2021-06-05 23:28:05,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:05,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:05,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:05,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:06,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708370769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:06,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:06,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:28:06,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816947942] [2021-06-05 23:28:06,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:06,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:06,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:06,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:06,017 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:06,457 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-06-05 23:28:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:28:06,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:06,460 INFO L225 Difference]: With dead ends: 1028 [2021-06-05 23:28:06,460 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 23:28:06,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 406.0ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:28:06,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 23:28:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-06-05 23:28:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-06-05 23:28:06,470 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-06-05 23:28:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:06,470 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-06-05 23:28:06,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-06-05 23:28:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:06,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:06,472 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:06,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:28:06,685 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-06-05 23:28:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:06,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604003015] [2021-06-05 23:28:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:06,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:06,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604003015] [2021-06-05 23:28:06,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604003015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:06,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227575452] [2021-06-05 23:28:06,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:06,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:28:06,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:06,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:28:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:07,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:07,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:07,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-06-05 23:28:07,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:28:07,460 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-06-05 23:28:07,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:28:07,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-06-05 23:28:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:07,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227575452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:07,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:07,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 23:28:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007268324] [2021-06-05 23:28:07,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:28:07,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:28:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:07,515 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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) [2021-06-05 23:28:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:08,609 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-06-05 23:28:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:28:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:08,612 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 23:28:08,612 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 23:28:08,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1094.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:28:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 23:28:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-06-05 23:28:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-06-05 23:28:08,621 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-06-05 23:28:08,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:08,622 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-06-05 23:28:08,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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) [2021-06-05 23:28:08,622 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-06-05 23:28:08,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:08,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:08,623 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:08,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:08,839 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-06-05 23:28:08,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:08,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595778562] [2021-06-05 23:28:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:09,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:09,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595778562] [2021-06-05 23:28:09,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595778562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:09,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736260966] [2021-06-05 23:28:09,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:09,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:09,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:09,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:09,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:09,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:09,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:09,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:09,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:09,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:09,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:09,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:09,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736260966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:09,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:09,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 23:28:09,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621019568] [2021-06-05 23:28:09,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:09,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:09,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:09,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:09,315 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-06-05 23:28:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:10,178 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-06-05 23:28:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:28:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:10,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:10,181 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 23:28:10,181 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 23:28:10,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 901.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:28:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 23:28:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-06-05 23:28:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-06-05 23:28:10,191 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-06-05 23:28:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:10,191 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-06-05 23:28:10,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-06-05 23:28:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-06-05 23:28:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:10,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:10,192 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:10,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:28:10,397 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-06-05 23:28:10,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:10,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98540925] [2021-06-05 23:28:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:10,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98540925] [2021-06-05 23:28:10,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98540925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:10,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716856162] [2021-06-05 23:28:10,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:10,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:10,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:10,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:10,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:10,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:10,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:10,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:10,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:10,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:10,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:10,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:10,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:10,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:10,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716856162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:10,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:10,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 23:28:10,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759052499] [2021-06-05 23:28:10,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:10,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:10,835 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-06-05 23:28:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:12,049 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-06-05 23:28:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:28:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:12,052 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 23:28:12,052 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 23:28:12,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1174.5ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:28:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 23:28:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-06-05 23:28:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-06-05 23:28:12,063 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-06-05 23:28:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:12,063 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-06-05 23:28:12,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-06-05 23:28:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-06-05 23:28:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:12,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:12,065 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:12,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:12,285 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-06-05 23:28:12,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:12,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115776764] [2021-06-05 23:28:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:12,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115776764] [2021-06-05 23:28:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115776764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004483587] [2021-06-05 23:28:12,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:28:12,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:12,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:12,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:28:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:12,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:12,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 7 [2021-06-05 23:28:12,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:12,836 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-06-05 23:28:12,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:12,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-06-05 23:28:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:12,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004483587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:12,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:12,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:28:12,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391743462] [2021-06-05 23:28:12,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:12,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:12,854 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-06-05 23:28:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:13,656 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-06-05 23:28:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:28:13,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:13,659 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 23:28:13,659 INFO L226 Difference]: Without dead ends: 1026 [2021-06-05 23:28:13,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 813.6ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:28:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-05 23:28:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-06-05 23:28:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.5068965517241377) internal successors, (2181), 870 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-06-05 23:28:13,671 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-06-05 23:28:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:13,671 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-06-05 23:28:13,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-06-05 23:28:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-06-05 23:28:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:13,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:13,673 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:13,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:13,881 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:13,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:13,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-06-05 23:28:13,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:13,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002397645] [2021-06-05 23:28:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:14,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002397645] [2021-06-05 23:28:14,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002397645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713966050] [2021-06-05 23:28:14,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:28:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:14,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:14,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:14,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:14,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:14,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:14,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:14,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:14,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:14,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:14,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713966050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:14,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:14,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 23:28:14,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730343885] [2021-06-05 23:28:14,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:14,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:14,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:14,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:14,284 INFO L87 Difference]: Start difference. First operand 871 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2021-06-05 23:28:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:15,058 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-06-05 23:28:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:28:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:15,061 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 23:28:15,061 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 23:28:15,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 736.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:28:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 23:28:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-06-05 23:28:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.50055617352614) internal successors, (2248), 899 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-06-05 23:28:15,073 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-06-05 23:28:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:15,073 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-06-05 23:28:15,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2021-06-05 23:28:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-06-05 23:28:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:15,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:15,074 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:15,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 23:28:15,289 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-06-05 23:28:15,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:15,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929155674] [2021-06-05 23:28:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:15,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:15,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929155674] [2021-06-05 23:28:15,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929155674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219089187] [2021-06-05 23:28:15,518 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 [2021-06-05 23:28:15,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:15,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:15,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:15,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:15,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:15,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:15,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:15,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:15,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:15,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:15,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219089187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:15,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 23:28:15,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781069496] [2021-06-05 23:28:15,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:15,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:15,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:15,708 INFO L87 Difference]: Start difference. First operand 900 states and 2248 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:16,810 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-06-05 23:28:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:28:16,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:16,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:16,813 INFO L225 Difference]: With dead ends: 1238 [2021-06-05 23:28:16,813 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 23:28:16,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1020.9ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:28:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 23:28:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-06-05 23:28:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.5) internal successors, (2390), 956 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-06-05 23:28:16,825 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-06-05 23:28:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:16,825 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-06-05 23:28:16,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-06-05 23:28:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:16,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:16,826 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:17,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:17,037 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-06-05 23:28:17,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:17,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189959423] [2021-06-05 23:28:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:17,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189959423] [2021-06-05 23:28:17,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189959423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817954620] [2021-06-05 23:28:17,235 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 [2021-06-05 23:28:17,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:28:17,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:17,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:28:17,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:17,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:17,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 47 [2021-06-05 23:28:17,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:28:17,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:17,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:28:17,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-06-05 23:28:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817954620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:17,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 23:28:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340482234] [2021-06-05 23:28:17,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:17,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:17,584 INFO L87 Difference]: Start difference. First operand 957 states and 2390 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2021-06-05 23:28:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:19,289 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-06-05 23:28:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:28:19,290 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:19,291 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 23:28:19,292 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 23:28:19,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1487.4ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:28:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 23:28:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-06-05 23:28:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.4942886812045693) internal successors, (2402), 963 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-06-05 23:28:19,302 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-06-05 23:28:19,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:19,302 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-06-05 23:28:19,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 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) [2021-06-05 23:28:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-06-05 23:28:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:19,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:19,304 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:19,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:28:19,517 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-06-05 23:28:19,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:19,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085590229] [2021-06-05 23:28:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:19,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085590229] [2021-06-05 23:28:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085590229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670030949] [2021-06-05 23:28:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:19,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:19,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:19,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:19,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:19,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:19,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:19,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:19,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:19,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:19,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:19,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:19,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670030949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:19,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:19,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 23:28:19,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918645683] [2021-06-05 23:28:19,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:19,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:19,991 INFO L87 Difference]: Start difference. First operand 964 states and 2402 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-06-05 23:28:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:20,925 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-06-05 23:28:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:28:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:20,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:20,927 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 23:28:20,927 INFO L226 Difference]: Without dead ends: 1283 [2021-06-05 23:28:20,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:28:20,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-06-05 23:28:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-06-05 23:28:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4989939637826963) internal successors, (2484), 994 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-06-05 23:28:20,939 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-06-05 23:28:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:20,939 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-06-05 23:28:20,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-06-05 23:28:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-06-05 23:28:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:20,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:20,940 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:21,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:21,147 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:21,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-06-05 23:28:21,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:21,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655308411] [2021-06-05 23:28:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:21,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655308411] [2021-06-05 23:28:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655308411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613044116] [2021-06-05 23:28:21,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:21,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:21,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:21,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:21,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:21,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:21,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:21,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:21,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:21,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:21,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:21,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:21,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:21,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613044116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:21,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:21,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 23:28:21,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318730234] [2021-06-05 23:28:21,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:21,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:21,544 INFO L87 Difference]: Start difference. First operand 995 states and 2484 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2021-06-05 23:28:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:22,276 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-06-05 23:28:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:28:22,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:22,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:22,279 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 23:28:22,279 INFO L226 Difference]: Without dead ends: 1263 [2021-06-05 23:28:22,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 662.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:28:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-05 23:28:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-06-05 23:28:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.513435700575816) internal successors, (2619), 1042 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-06-05 23:28:22,291 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-06-05 23:28:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:22,291 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-06-05 23:28:22,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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) [2021-06-05 23:28:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-06-05 23:28:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:22,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:22,293 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:22,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 23:28:22,501 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-06-05 23:28:22,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:22,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47697336] [2021-06-05 23:28:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:22,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:22,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47697336] [2021-06-05 23:28:22,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47697336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:22,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322184867] [2021-06-05 23:28:22,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:22,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:28:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:22,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 23:28:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:23,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:23,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:23,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-06-05 23:28:23,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:28:23,073 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-06-05 23:28:23,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:23,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-06-05 23:28:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:23,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322184867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:23,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:23,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 23:28:23,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580128684] [2021-06-05 23:28:23,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:28:23,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:28:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:23,175 INFO L87 Difference]: Start difference. First operand 1043 states and 2619 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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) [2021-06-05 23:28:24,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:24,966 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-06-05 23:28:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:28:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:24,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:24,968 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 23:28:24,968 INFO L226 Difference]: Without dead ends: 1436 [2021-06-05 23:28:24,968 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1755.9ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:28:24,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-06-05 23:28:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-06-05 23:28:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.511520737327189) internal successors, (2725), 1085 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-06-05 23:28:24,980 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-06-05 23:28:24,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:24,980 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-06-05 23:28:24,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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) [2021-06-05 23:28:24,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-06-05 23:28:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:24,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:24,982 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:25,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 23:28:25,189 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:25,189 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-06-05 23:28:25,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:25,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205915868] [2021-06-05 23:28:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:25,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205915868] [2021-06-05 23:28:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205915868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718608048] [2021-06-05 23:28:25,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:25,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:25,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:25,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:25,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:25,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:25,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:25,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:25,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:25,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:25,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:25,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:25,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718608048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:25,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:25,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 23:28:25,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017694626] [2021-06-05 23:28:25,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:25,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:25,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:25,608 INFO L87 Difference]: Start difference. First operand 1086 states and 2725 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:26,606 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-06-05 23:28:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:28:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:26,608 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 23:28:26,608 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 23:28:26,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 972.3ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:28:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 23:28:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-06-05 23:28:26,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.5013501350135012) internal successors, (2779), 1111 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) [2021-06-05 23:28:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-06-05 23:28:26,619 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-06-05 23:28:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:26,619 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-06-05 23:28:26,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-06-05 23:28:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:28:26,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:26,620 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:26,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:26,829 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-06-05 23:28:26,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:26,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995026844] [2021-06-05 23:28:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:27,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:27,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995026844] [2021-06-05 23:28:27,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995026844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483435476] [2021-06-05 23:28:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:27,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:27,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:28:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 23:28:27,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:27,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:27,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:27,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 23:28:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:27,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483435476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:27,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 23:28:27,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60235263] [2021-06-05 23:28:27,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:27,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:27,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:27,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:27,254 INFO L87 Difference]: Start difference. First operand 1112 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:28,312 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-06-05 23:28:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:28:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:28:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:28,314 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 23:28:28,314 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 23:28:28,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 993.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:28:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 23:28:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-06-05 23:28:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.500892857142857) internal successors, (2801), 1120 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-06-05 23:28:28,325 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-06-05 23:28:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:28,326 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-06-05 23:28:28,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-06-05 23:28:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:28,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:28,327 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:28,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:28,541 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-06-05 23:28:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390512032] [2021-06-05 23:28:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:28,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390512032] [2021-06-05 23:28:28,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390512032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199187518] [2021-06-05 23:28:28,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:28,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:28,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:28,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:28,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199187518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:28,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 23:28:28,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431979309] [2021-06-05 23:28:28,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:28:28,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:28,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:28:28,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:28:28,805 INFO L87 Difference]: Start difference. First operand 1121 states and 2801 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-06-05 23:28:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:29,445 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-06-05 23:28:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:28:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 28 [2021-06-05 23:28:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:29,447 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 23:28:29,447 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 23:28:29,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:28:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 23:28:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-06-05 23:28:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.503249767873723) internal successors, (2696), 1077 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-06-05 23:28:29,459 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-06-05 23:28:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:29,459 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-06-05 23:28:29,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-06-05 23:28:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-06-05 23:28:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:29,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:29,460 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:29,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:29,661 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-06-05 23:28:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:29,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497796345] [2021-06-05 23:28:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:29,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:29,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497796345] [2021-06-05 23:28:29,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497796345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:29,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27701775] [2021-06-05 23:28:29,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:29,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:29,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27701775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:29,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:29,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:29,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402286333] [2021-06-05 23:28:29,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:29,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:29,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:29,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:29,876 INFO L87 Difference]: Start difference. First operand 1078 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:30,722 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-06-05 23:28:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:28:30,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:30,725 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 23:28:30,725 INFO L226 Difference]: Without dead ends: 2008 [2021-06-05 23:28:30,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 789.0ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:28:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-05 23:28:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-06-05 23:28:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.519904458598726) internal successors, (3165), 1256 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-06-05 23:28:30,742 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-06-05 23:28:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:30,742 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-06-05 23:28:30,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-06-05 23:28:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:30,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:30,744 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:30,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 23:28:30,957 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:30,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-06-05 23:28:30,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:30,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437178839] [2021-06-05 23:28:30,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:30,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:30,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437178839] [2021-06-05 23:28:30,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437178839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:30,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91386472] [2021-06-05 23:28:30,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:31,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:31,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:31,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:31,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91386472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:31,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:31,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 23:28:31,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237564123] [2021-06-05 23:28:31,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:31,160 INFO L87 Difference]: Start difference. First operand 1257 states and 3165 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:31,873 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-06-05 23:28:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:28:31,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:31,876 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 23:28:31,876 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 23:28:31,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:28:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 23:28:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-06-05 23:28:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.5372168284789645) internal successors, (3920), 1545 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-06-05 23:28:31,895 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-06-05 23:28:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:31,895 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-06-05 23:28:31,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-06-05 23:28:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:31,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:31,897 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:32,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:32,105 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-06-05 23:28:32,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:32,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326994273] [2021-06-05 23:28:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:32,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326994273] [2021-06-05 23:28:32,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326994273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007762133] [2021-06-05 23:28:32,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:32,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:28:32,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007762133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:32,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 23:28:32,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727720856] [2021-06-05 23:28:32,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:32,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:32,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:32,290 INFO L87 Difference]: Start difference. First operand 1546 states and 3920 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:32,878 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-06-05 23:28:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:28:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:32,881 INFO L225 Difference]: With dead ends: 1833 [2021-06-05 23:28:32,881 INFO L226 Difference]: Without dead ends: 1829 [2021-06-05 23:28:32,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:28:32,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-05 23:28:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-06-05 23:28:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 2.5392221489782467) internal successors, (3852), 1517 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-06-05 23:28:32,896 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-06-05 23:28:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:32,896 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-06-05 23:28:32,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-06-05 23:28:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:32,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:32,897 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:33,113 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-06-05 23:28:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:33,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090537478] [2021-06-05 23:28:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:33,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090537478] [2021-06-05 23:28:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090537478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356056654] [2021-06-05 23:28:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:33,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356056654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:33,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 23:28:33,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795389445] [2021-06-05 23:28:33,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:33,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:33,298 INFO L87 Difference]: Start difference. First operand 1518 states and 3852 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:33,799 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-06-05 23:28:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:28:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:33,802 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 23:28:33,803 INFO L226 Difference]: Without dead ends: 2117 [2021-06-05 23:28:33,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:28:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-06-05 23:28:33,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-06-05 23:28:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.553020961775586) internal successors, (4141), 1622 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-06-05 23:28:33,822 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-06-05 23:28:33,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:33,822 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-06-05 23:28:33,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-06-05 23:28:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:33,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:33,824 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:34,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:28:34,041 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-06-05 23:28:34,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:34,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845168140] [2021-06-05 23:28:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:34,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845168140] [2021-06-05 23:28:34,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845168140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:34,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381465067] [2021-06-05 23:28:34,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:34,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381465067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:34,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:34,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 23:28:34,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367038562] [2021-06-05 23:28:34,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:34,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:34,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:34,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:34,243 INFO L87 Difference]: Start difference. First operand 1623 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:34,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:34,848 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-06-05 23:28:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:28:34,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:34,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:34,851 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 23:28:34,851 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 23:28:34,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:28:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 23:28:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-06-05 23:28:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 2.5635820895522388) internal successors, (4294), 1675 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-06-05 23:28:34,869 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-06-05 23:28:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:34,869 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-06-05 23:28:34,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-06-05 23:28:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:34,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:34,871 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:35,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:28:35,085 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-06-05 23:28:35,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:35,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682151680] [2021-06-05 23:28:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:35,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:35,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682151680] [2021-06-05 23:28:35,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682151680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:35,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167937276] [2021-06-05 23:28:35,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:35,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:28:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:35,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167937276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:35,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:35,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 23:28:35,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857523927] [2021-06-05 23:28:35,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:35,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:35,282 INFO L87 Difference]: Start difference. First operand 1676 states and 4294 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 23:28:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:35,892 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-06-05 23:28:35,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:28:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:35,894 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 23:28:35,894 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 23:28:35,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 565.3ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:28:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 23:28:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-06-05 23:28:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.5510331872260488) internal successors, (4074), 1597 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-06-05 23:28:35,916 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-06-05 23:28:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:35,916 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-06-05 23:28:35,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 23:28:35,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-06-05 23:28:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:35,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:35,918 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:36,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:28:36,129 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-06-05 23:28:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:36,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860394080] [2021-06-05 23:28:36,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:36,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860394080] [2021-06-05 23:28:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860394080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902357082] [2021-06-05 23:28:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:36,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:36,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:36,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902357082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:36,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:36,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862494274] [2021-06-05 23:28:36,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:36,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:36,353 INFO L87 Difference]: Start difference. First operand 1598 states and 4074 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:37,000 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-06-05 23:28:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:28:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:37,002 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 23:28:37,002 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 23:28:37,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 599.1ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:28:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 23:28:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-06-05 23:28:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.5097332372025956) internal successors, (3481), 1387 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-06-05 23:28:37,018 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-06-05 23:28:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:37,018 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-06-05 23:28:37,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-06-05 23:28:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:37,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:37,019 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:37,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:37,220 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-06-05 23:28:37,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:37,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193233092] [2021-06-05 23:28:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:37,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193233092] [2021-06-05 23:28:37,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193233092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:37,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321327943] [2021-06-05 23:28:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:37,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:37,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:37,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:37,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321327943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:37,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:37,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 23:28:37,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54168609] [2021-06-05 23:28:37,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:37,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:37,421 INFO L87 Difference]: Start difference. First operand 1388 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 23:28:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:38,010 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-06-05 23:28:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:28:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:38,011 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 23:28:38,012 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 23:28:38,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:28:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 23:28:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-06-05 23:28:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.495873968492123) internal successors, (3327), 1333 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:38,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-06-05 23:28:38,025 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-06-05 23:28:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:38,025 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-06-05 23:28:38,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 23:28:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-06-05 23:28:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:38,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:38,027 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:38,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:38,227 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:38,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:38,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-06-05 23:28:38,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:38,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713761026] [2021-06-05 23:28:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:38,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:38,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713761026] [2021-06-05 23:28:38,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713761026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:38,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732852880] [2021-06-05 23:28:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:38,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:38,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:38,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732852880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:38,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:38,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 23:28:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22971745] [2021-06-05 23:28:38,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:38,444 INFO L87 Difference]: Start difference. First operand 1334 states and 3327 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:39,145 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-06-05 23:28:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:28:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:39,147 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 23:28:39,147 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 23:28:39,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:28:39,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 23:28:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-06-05 23:28:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4714881780250346) internal successors, (3554), 1438 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-06-05 23:28:39,164 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-06-05 23:28:39,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:39,164 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-06-05 23:28:39,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-06-05 23:28:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:39,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:39,165 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:39,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:39,366 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-06-05 23:28:39,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:39,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346548994] [2021-06-05 23:28:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:39,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346548994] [2021-06-05 23:28:39,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346548994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:39,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056330495] [2021-06-05 23:28:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:39,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:39,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056330495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:39,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:39,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 23:28:39,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193159816] [2021-06-05 23:28:39,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:39,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:39,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:39,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:39,556 INFO L87 Difference]: Start difference. First operand 1439 states and 3554 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:40,138 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-06-05 23:28:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:28:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:40,140 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 23:28:40,140 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 23:28:40,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:28:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 23:28:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-06-05 23:28:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.4751531654186523) internal successors, (3636), 1469 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-06-05 23:28:40,154 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-06-05 23:28:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:40,155 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-06-05 23:28:40,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-06-05 23:28:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:40,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:40,156 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:40,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:40,358 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:40,359 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-06-05 23:28:40,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:40,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439769102] [2021-06-05 23:28:40,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:40,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:40,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439769102] [2021-06-05 23:28:40,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439769102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:40,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31501078] [2021-06-05 23:28:40,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:40,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:40,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:40,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:40,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:40,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31501078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:40,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:40,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 23:28:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379474176] [2021-06-05 23:28:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:40,556 INFO L87 Difference]: Start difference. First operand 1470 states and 3636 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-06-05 23:28:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:41,299 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-06-05 23:28:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:28:41,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 28 [2021-06-05 23:28:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:41,301 INFO L225 Difference]: With dead ends: 2870 [2021-06-05 23:28:41,301 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 23:28:41,301 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 678.0ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:28:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 23:28:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-06-05 23:28:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 2.5527593818984546) internal successors, (5782), 2265 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-06-05 23:28:41,324 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-06-05 23:28:41,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:41,325 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-06-05 23:28:41,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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) [2021-06-05 23:28:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-06-05 23:28:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:41,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:41,327 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:41,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 23:28:41,527 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-06-05 23:28:41,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:41,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491173032] [2021-06-05 23:28:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:41,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491173032] [2021-06-05 23:28:41,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491173032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270063653] [2021-06-05 23:28:41,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:41,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:41,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270063653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:41,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:41,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 23:28:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290393870] [2021-06-05 23:28:41,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:41,713 INFO L87 Difference]: Start difference. First operand 2266 states and 5782 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:42,223 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-06-05 23:28:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:28:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:42,226 INFO L225 Difference]: With dead ends: 2793 [2021-06-05 23:28:42,226 INFO L226 Difference]: Without dead ends: 2789 [2021-06-05 23:28:42,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:28:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-05 23:28:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-06-05 23:28:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5502456453774007) internal successors, (5710), 2239 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:42,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-06-05 23:28:42,249 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-06-05 23:28:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:42,250 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-06-05 23:28:42,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-06-05 23:28:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:42,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:42,252 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:42,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:42,452 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-06-05 23:28:42,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:42,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068137965] [2021-06-05 23:28:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:42,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:42,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068137965] [2021-06-05 23:28:42,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068137965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:42,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401911085] [2021-06-05 23:28:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:42,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:42,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:42,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:42,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401911085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:42,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:42,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 23:28:42,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549037845] [2021-06-05 23:28:42,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:42,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:42,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:42,633 INFO L87 Difference]: Start difference. First operand 2240 states and 5710 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:43,145 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-06-05 23:28:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:28:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:43,148 INFO L225 Difference]: With dead ends: 2987 [2021-06-05 23:28:43,148 INFO L226 Difference]: Without dead ends: 2975 [2021-06-05 23:28:43,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:28:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-06-05 23:28:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-06-05 23:28:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.5652355147978323) internal successors, (6154), 2399 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-06-05 23:28:43,173 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-06-05 23:28:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:43,173 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-06-05 23:28:43,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-06-05 23:28:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:43,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:43,175 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:43,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 23:28:43,375 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:43,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-06-05 23:28:43,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:43,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545761572] [2021-06-05 23:28:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:43,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:43,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545761572] [2021-06-05 23:28:43,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545761572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:43,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820003936] [2021-06-05 23:28:43,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:43,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:43,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:43,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:43,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820003936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:43,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:43,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 23:28:43,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151869237] [2021-06-05 23:28:43,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:43,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:43,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:43,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:43,606 INFO L87 Difference]: Start difference. First operand 2400 states and 6154 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 23:28:44,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:44,177 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-06-05 23:28:44,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:28:44,177 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:44,180 INFO L225 Difference]: With dead ends: 3282 [2021-06-05 23:28:44,180 INFO L226 Difference]: Without dead ends: 3262 [2021-06-05 23:28:44,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:28:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-06-05 23:28:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-06-05 23:28:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.5788271134805787) internal successors, (6772), 2626 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-06-05 23:28:44,208 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-06-05 23:28:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:44,208 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-06-05 23:28:44,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 23:28:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-06-05 23:28:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:28:44,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:44,211 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:44,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 23:28:44,411 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:44,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-06-05 23:28:44,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:44,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178650269] [2021-06-05 23:28:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:44,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:44,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178650269] [2021-06-05 23:28:44,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178650269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:44,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997758708] [2021-06-05 23:28:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:44,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:44,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:44,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:44,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997758708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:44,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:44,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:44,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370108987] [2021-06-05 23:28:44,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:44,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:44,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:44,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:44,629 INFO L87 Difference]: Start difference. First operand 2627 states and 6772 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:45,256 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-06-05 23:28:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:28:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:28:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:45,259 INFO L225 Difference]: With dead ends: 3390 [2021-06-05 23:28:45,259 INFO L226 Difference]: Without dead ends: 3362 [2021-06-05 23:28:45,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:28:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-06-05 23:28:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-06-05 23:28:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.5862808145766345) internal successors, (7239), 2799 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-06-05 23:28:45,291 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-06-05 23:28:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:45,291 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-06-05 23:28:45,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-06-05 23:28:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:45,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:45,293 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:45,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:45,497 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-06-05 23:28:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012408214] [2021-06-05 23:28:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:45,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:45,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012408214] [2021-06-05 23:28:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012408214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:45,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892640608] [2021-06-05 23:28:45,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:45,771 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:28:45,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:46,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:46,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:46,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:46,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:28:46,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:46,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:46,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:46,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:28:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:46,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892640608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:46,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:46,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:28:46,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123589509] [2021-06-05 23:28:46,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:28:46,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:28:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:46,072 INFO L87 Difference]: Start difference. First operand 2800 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:47,730 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-06-05 23:28:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:28:47,730 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:28:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:47,733 INFO L225 Difference]: With dead ends: 3814 [2021-06-05 23:28:47,733 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 23:28:47,734 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1500.8ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:28:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 23:28:47,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-06-05 23:28:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.5878236529041287) internal successors, (7396), 2858 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-06-05 23:28:47,762 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-06-05 23:28:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:47,762 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-06-05 23:28:47,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-06-05 23:28:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:47,765 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:47,765 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:47,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:28:47,975 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-06-05 23:28:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:47,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831364199] [2021-06-05 23:28:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:48,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:48,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831364199] [2021-06-05 23:28:48,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831364199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:48,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046717482] [2021-06-05 23:28:48,251 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 [2021-06-05 23:28:48,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:48,276 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:28:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:48,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:48,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:28:48,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:48,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:48,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:48,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:28:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046717482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:48,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:48,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:28:48,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234658163] [2021-06-05 23:28:48,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:28:48,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:48,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:28:48,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:48,551 INFO L87 Difference]: Start difference. First operand 2859 states and 7396 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:49,821 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-06-05 23:28:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:28:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:28:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:49,824 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 23:28:49,824 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 23:28:49,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1284.6ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:28:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 23:28:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-06-05 23:28:49,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.5774647887323945) internal successors, (7503), 2911 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-06-05 23:28:49,852 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-06-05 23:28:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:49,852 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-06-05 23:28:49,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-06-05 23:28:49,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:49,855 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:49,855 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:50,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:50,055 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:50,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-06-05 23:28:50,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:50,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896923033] [2021-06-05 23:28:50,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:50,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:50,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896923033] [2021-06-05 23:28:50,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896923033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:50,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126708364] [2021-06-05 23:28:50,343 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 [2021-06-05 23:28:50,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:50,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:28:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:50,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:50,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:50,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:50,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:50,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:50,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:50,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-06-05 23:28:51,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 23:28:51,319 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-06-05 23:28:51,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:28:51,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-06-05 23:28:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:51,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126708364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:51,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:51,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 23:28:51,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283697250] [2021-06-05 23:28:51,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:28:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:28:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:28:51,379 INFO L87 Difference]: Start difference. First operand 2912 states and 7503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 23:28:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:53,054 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-06-05 23:28:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:28:53,055 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 [2021-06-05 23:28:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:53,058 INFO L225 Difference]: With dead ends: 3918 [2021-06-05 23:28:53,058 INFO L226 Difference]: Without dead ends: 3872 [2021-06-05 23:28:53,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1674.8ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:28:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-06-05 23:28:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-06-05 23:28:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.572250423011844) internal successors, (7601), 2955 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) [2021-06-05 23:28:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-06-05 23:28:53,086 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-06-05 23:28:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:53,086 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-06-05 23:28:53,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 23:28:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-06-05 23:28:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:53,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:53,089 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:53,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-05 23:28:53,289 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:53,289 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-06-05 23:28:53,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:53,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297249987] [2021-06-05 23:28:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:53,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297249987] [2021-06-05 23:28:53,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297249987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539971335] [2021-06-05 23:28:53,559 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 [2021-06-05 23:28:53,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:53,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:53,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:28:53,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:53,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:53,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:53,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:28:53,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:53,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:53,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:53,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:28:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:53,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539971335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:53,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:53,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:28:53,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505683105] [2021-06-05 23:28:53,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:28:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:28:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:53,857 INFO L87 Difference]: Start difference. First operand 2956 states and 7601 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:55,266 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-06-05 23:28:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:28:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:28:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:55,270 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 23:28:55,270 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 23:28:55,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1378.8ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:28:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 23:28:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-06-05 23:28:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 2.5626026947091685) internal successors, (7798), 3043 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-06-05 23:28:55,299 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-06-05 23:28:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:55,299 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-06-05 23:28:55,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-06-05 23:28:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:55,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:55,302 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:55,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:55,517 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-06-05 23:28:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:55,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647376149] [2021-06-05 23:28:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:55,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:55,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647376149] [2021-06-05 23:28:55,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647376149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:55,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320001091] [2021-06-05 23:28:55,787 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 [2021-06-05 23:28:55,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:28:55,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:55,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:28:55,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:28:56,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:56,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:56,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:56,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:28:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320001091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:56,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:56,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:28:56,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902016912] [2021-06-05 23:28:56,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:28:56,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:28:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:56,068 INFO L87 Difference]: Start difference. First operand 3044 states and 7798 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:57,830 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-06-05 23:28:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:28:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:28:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:57,833 INFO L225 Difference]: With dead ends: 4375 [2021-06-05 23:28:57,833 INFO L226 Difference]: Without dead ends: 4366 [2021-06-05 23:28:57,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1669.8ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:28:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-05 23:28:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-06-05 23:28:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5682114882506526) internal successors, (7869), 3064 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-06-05 23:28:57,865 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-06-05 23:28:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-06-05 23:28:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:28:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-06-05 23:28:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:28:57,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:57,868 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:58,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 23:28:58,069 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-06-05 23:28:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229490876] [2021-06-05 23:28:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:58,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:58,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229490876] [2021-06-05 23:28:58,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229490876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:58,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824739947] [2021-06-05 23:28:58,296 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 [2021-06-05 23:28:58,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:58,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:58,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:28:58,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:58,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:58,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:28:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:58,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:28:58,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:28:58,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:58,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:58,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:58,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:28:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:58,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824739947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:58,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:58,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:28:58,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110014408] [2021-06-05 23:28:58,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:28:58,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:58,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:28:58,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:58,614 INFO L87 Difference]: Start difference. First operand 3065 states and 7869 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:00,170 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-06-05 23:29:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:29:00,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:00,174 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 23:29:00,174 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 23:29:00,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1431.0ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:29:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 23:29:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-06-05 23:29:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 2.5580815945188413) internal successors, (8214), 3211 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-06-05 23:29:00,205 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-06-05 23:29:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:00,205 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-06-05 23:29:00,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-06-05 23:29:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:00,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:00,208 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:00,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 23:29:00,409 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-06-05 23:29:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:00,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932310915] [2021-06-05 23:29:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:00,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:00,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932310915] [2021-06-05 23:29:00,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932310915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:00,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269504920] [2021-06-05 23:29:00,673 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 [2021-06-05 23:29:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:00,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:00,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:00,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:00,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:00,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:00,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:00,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:00,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:00,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269504920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:00,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:00,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:00,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093202358] [2021-06-05 23:29:00,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:00,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:00,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:00,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:00,945 INFO L87 Difference]: Start difference. First operand 3212 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:02,409 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-06-05 23:29:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:29:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:02,412 INFO L225 Difference]: With dead ends: 3557 [2021-06-05 23:29:02,412 INFO L226 Difference]: Without dead ends: 3530 [2021-06-05 23:29:02,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1328.5ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:29:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-06-05 23:29:02,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-06-05 23:29:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.5523721503388788) internal successors, (8285), 3246 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-06-05 23:29:02,440 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-06-05 23:29:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:02,440 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-06-05 23:29:02,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-06-05 23:29:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:02,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:02,443 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 23:29:02,644 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-06-05 23:29:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:02,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773153700] [2021-06-05 23:29:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:02,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:02,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773153700] [2021-06-05 23:29:02,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773153700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:02,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504580469] [2021-06-05 23:29:02,840 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 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 [2021-06-05 23:29:02,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:02,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:03,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:03,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:03,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:03,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:03,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:03,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:03,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504580469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:03,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:03,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:03,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721523207] [2021-06-05 23:29:03,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:03,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:03,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:03,127 INFO L87 Difference]: Start difference. First operand 3247 states and 8285 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:04,353 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-06-05 23:29:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:29:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:04,357 INFO L225 Difference]: With dead ends: 4594 [2021-06-05 23:29:04,357 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 23:29:04,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1253.2ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:29:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 23:29:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-06-05 23:29:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.5477140227063515) internal successors, (8303), 3259 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-06-05 23:29:04,398 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-06-05 23:29:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:04,398 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-06-05 23:29:04,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-06-05 23:29:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:04,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:04,401 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:04,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 23:29:04,601 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:04,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-06-05 23:29:04,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:04,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530616882] [2021-06-05 23:29:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:29:04,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530616882] [2021-06-05 23:29:04,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530616882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:04,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808215674] [2021-06-05 23:29:04,832 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 [2021-06-05 23:29:04,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:29:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:04,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:29:04,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:05,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:05,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:05,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 151 [2021-06-05 23:29:05,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 23:29:05,442 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-06-05 23:29:05,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:05,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-06-05 23:29:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:05,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808215674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:05,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:05,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 23:29:05,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224043003] [2021-06-05 23:29:05,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:29:05,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:05,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:29:05,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:05,574 INFO L87 Difference]: Start difference. First operand 3260 states and 8303 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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) [2021-06-05 23:29:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:08,688 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-06-05 23:29:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:29:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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 [2021-06-05 23:29:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:08,692 INFO L225 Difference]: With dead ends: 4752 [2021-06-05 23:29:08,692 INFO L226 Difference]: Without dead ends: 4721 [2021-06-05 23:29:08,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 2830.1ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:29:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-05 23:29:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-06-05 23:29:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.5467032967032965) internal successors, (8343), 3276 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-06-05 23:29:08,728 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-06-05 23:29:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:08,728 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-06-05 23:29:08,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 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) [2021-06-05 23:29:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-06-05 23:29:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:08,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:08,731 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:08,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 23:29:08,945 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-06-05 23:29:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:08,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254896995] [2021-06-05 23:29:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:29:09,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254896995] [2021-06-05 23:29:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254896995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853998895] [2021-06-05 23:29:09,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:29:09,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:09,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:09,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:09,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:09,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:09,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:09,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:09,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:09,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:09,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:09,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:09,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853998895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:09,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:09,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:09,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417770146] [2021-06-05 23:29:09,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:09,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:09,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:09,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:09,432 INFO L87 Difference]: Start difference. First operand 3277 states and 8343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:10,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:10,868 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-06-05 23:29:10,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:29:10,868 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:10,871 INFO L225 Difference]: With dead ends: 3751 [2021-06-05 23:29:10,871 INFO L226 Difference]: Without dead ends: 3733 [2021-06-05 23:29:10,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1359.7ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:29:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-06-05 23:29:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-06-05 23:29:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 2.5457326399510554) internal successors, (8322), 3269 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-06-05 23:29:10,900 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-06-05 23:29:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:10,900 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-06-05 23:29:10,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-06-05 23:29:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:10,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:10,902 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:11,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2021-06-05 23:29:11,103 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-06-05 23:29:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:11,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144344788] [2021-06-05 23:29:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:11,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144344788] [2021-06-05 23:29:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144344788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:11,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646499742] [2021-06-05 23:29:11,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:29:11,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:29:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:11,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:11,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:11,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:11,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:11,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:11,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:11,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:11,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646499742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:11,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:11,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:11,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328898148] [2021-06-05 23:29:11,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:11,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:11,580 INFO L87 Difference]: Start difference. First operand 3270 states and 8322 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 23:29:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:12,316 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-06-05 23:29:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:29:12,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 [2021-06-05 23:29:12,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:12,319 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 23:29:12,320 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 23:29:12,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 748.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:29:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 23:29:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-06-05 23:29:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.5403422982885084) internal successors, (8312), 3272 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-06-05 23:29:12,355 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-06-05 23:29:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:12,355 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-06-05 23:29:12,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 23:29:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-06-05 23:29:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:12,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:12,358 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:12,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:12,573 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:12,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:12,573 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-06-05 23:29:12,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:12,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666107378] [2021-06-05 23:29:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:12,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:12,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666107378] [2021-06-05 23:29:12,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666107378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:12,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701074643] [2021-06-05 23:29:12,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:12,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:29:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:12,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:29:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:13,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:13,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:13,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:13,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:13,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:13,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-06-05 23:29:13,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:29:13,235 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-06-05 23:29:13,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:13,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-05 23:29:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:13,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701074643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:13,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:13,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 23:29:13,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896710851] [2021-06-05 23:29:13,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:29:13,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:29:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:13,340 INFO L87 Difference]: Start difference. First operand 3273 states and 8312 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-06-05 23:29:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:15,696 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-06-05 23:29:15,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:29:15,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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 [2021-06-05 23:29:15,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:15,700 INFO L225 Difference]: With dead ends: 4934 [2021-06-05 23:29:15,700 INFO L226 Difference]: Without dead ends: 4898 [2021-06-05 23:29:15,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2322.4ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:29:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-05 23:29:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-06-05 23:29:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.557738814993954) internal successors, (8461), 3308 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-06-05 23:29:15,738 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-06-05 23:29:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:15,738 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-06-05 23:29:15,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-06-05 23:29:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-06-05 23:29:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:15,741 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:15,741 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:15,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:15,945 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-06-05 23:29:15,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:15,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867070136] [2021-06-05 23:29:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:16,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:16,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867070136] [2021-06-05 23:29:16,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867070136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:16,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962351684] [2021-06-05 23:29:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:16,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:16,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:16,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:16,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:16,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:16,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962351684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:16,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:16,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:16,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726518500] [2021-06-05 23:29:16,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:16,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:16,432 INFO L87 Difference]: Start difference. First operand 3309 states and 8461 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:17,803 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-06-05 23:29:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:29:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:17,806 INFO L225 Difference]: With dead ends: 3897 [2021-06-05 23:29:17,806 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 23:29:17,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1297.0ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:29:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 23:29:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-06-05 23:29:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.537699680511182) internal successors, (7943), 3130 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-06-05 23:29:17,839 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-06-05 23:29:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:17,839 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-06-05 23:29:17,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-06-05 23:29:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:17,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:17,841 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:18,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 23:29:18,042 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-06-05 23:29:18,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:18,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686032809] [2021-06-05 23:29:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:18,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686032809] [2021-06-05 23:29:18,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686032809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:18,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873186487] [2021-06-05 23:29:18,239 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) [2021-06-05 23:29:18,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:18,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:18,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:18,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:18,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:18,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:18,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:18,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:18,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:18,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873186487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:18,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:18,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:18,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796769861] [2021-06-05 23:29:18,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:18,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:18,535 INFO L87 Difference]: Start difference. First operand 3131 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:20,273 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-06-05 23:29:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:29:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:20,276 INFO L225 Difference]: With dead ends: 3917 [2021-06-05 23:29:20,276 INFO L226 Difference]: Without dead ends: 3891 [2021-06-05 23:29:20,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1478.5ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:29:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-06-05 23:29:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-06-05 23:29:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.537174721189591) internal successors, (8190), 3228 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-06-05 23:29:20,308 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-06-05 23:29:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:20,308 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-06-05 23:29:20,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:20,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-06-05 23:29:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:20,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:20,310 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:20,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 23:29:20,510 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:20,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-06-05 23:29:20,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:20,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576551694] [2021-06-05 23:29:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:20,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576551694] [2021-06-05 23:29:20,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576551694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544713363] [2021-06-05 23:29:20,713 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 [2021-06-05 23:29:20,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:29:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:20,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:29:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:21,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:21,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:21,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-06-05 23:29:21,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:29:21,657 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-06-05 23:29:21,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:21,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-05 23:29:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544713363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:21,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 23:29:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577282945] [2021-06-05 23:29:21,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:29:21,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:29:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:21,752 INFO L87 Difference]: Start difference. First operand 3229 states and 8190 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-06-05 23:29:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:24,967 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-06-05 23:29:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:29:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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 [2021-06-05 23:29:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:24,972 INFO L225 Difference]: With dead ends: 4685 [2021-06-05 23:29:24,972 INFO L226 Difference]: Without dead ends: 4633 [2021-06-05 23:29:24,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2798.0ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:29:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-06-05 23:29:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-06-05 23:29:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 2.553873552983081) internal successors, (8604), 3369 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-06-05 23:29:25,007 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-06-05 23:29:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:25,007 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-06-05 23:29:25,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-06-05 23:29:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-06-05 23:29:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:25,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:25,010 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:25,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 23:29:25,211 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-06-05 23:29:25,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:25,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077904697] [2021-06-05 23:29:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077904697] [2021-06-05 23:29:25,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077904697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734215665] [2021-06-05 23:29:25,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:25,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:25,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:25,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:25,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:25,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:25,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:25,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:25,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:25,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:25,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734215665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:25,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:25,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:25,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067546977] [2021-06-05 23:29:25,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:25,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:25,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:25,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:25,700 INFO L87 Difference]: Start difference. First operand 3370 states and 8604 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 23:29:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:26,781 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-06-05 23:29:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:29:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 [2021-06-05 23:29:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:26,785 INFO L225 Difference]: With dead ends: 3767 [2021-06-05 23:29:26,785 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 23:29:26,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1095.9ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:29:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 23:29:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-06-05 23:29:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.53731778425656) internal successors, (8703), 3430 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-06-05 23:29:26,830 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-06-05 23:29:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:26,830 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-06-05 23:29:26,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 23:29:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-06-05 23:29:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:26,833 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:26,833 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:27,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:27,033 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-06-05 23:29:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:27,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58637154] [2021-06-05 23:29:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:27,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:27,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58637154] [2021-06-05 23:29:27,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58637154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:27,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142692041] [2021-06-05 23:29:27,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:27,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:29:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:27,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:27,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:27,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:27,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:27,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:27,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:27,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:27,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:27,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:27,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142692041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:27,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:27,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:29:27,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063844023] [2021-06-05 23:29:27,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:27,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:27,559 INFO L87 Difference]: Start difference. First operand 3431 states and 8703 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:29:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:28,833 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-06-05 23:29:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:29:28,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:29:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:28,837 INFO L225 Difference]: With dead ends: 4784 [2021-06-05 23:29:28,837 INFO L226 Difference]: Without dead ends: 4733 [2021-06-05 23:29:28,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1205.5ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:29:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-05 23:29:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-06-05 23:29:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.5367132867132867) internal successors, (8706), 3432 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-06-05 23:29:28,873 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-06-05 23:29:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:28,874 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-06-05 23:29:28,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:29:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-06-05 23:29:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:28,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:28,876 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:29,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 23:29:29,077 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-06-05 23:29:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:29,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16904948] [2021-06-05 23:29:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:29,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:29,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16904948] [2021-06-05 23:29:29,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16904948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:29,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612727843] [2021-06-05 23:29:29,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:29,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:29:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:29,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:29:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:29,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:29,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:29,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:29,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:29,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-06-05 23:29:29,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:29:29,710 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-06-05 23:29:29,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:29,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-05 23:29:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:29,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612727843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:29,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:29,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 23:29:29,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877257982] [2021-06-05 23:29:29,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:29:29,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:29,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:29:29,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:29:29,805 INFO L87 Difference]: Start difference. First operand 3433 states and 8706 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:29:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:32,233 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-06-05 23:29:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:29:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 [2021-06-05 23:29:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:32,247 INFO L225 Difference]: With dead ends: 4909 [2021-06-05 23:29:32,247 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 23:29:32,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2486.7ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 23:29:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 23:29:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-06-05 23:29:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 2.528030930682132) internal successors, (9154), 3621 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-06-05 23:29:32,284 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-06-05 23:29:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:32,284 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-06-05 23:29:32,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:29:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-06-05 23:29:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:32,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:32,287 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:32,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:32,497 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-06-05 23:29:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283009345] [2021-06-05 23:29:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:32,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:32,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283009345] [2021-06-05 23:29:32,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283009345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:32,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818635677] [2021-06-05 23:29:32,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:32,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:32,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:32,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:32,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:32,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:32,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:32,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:32,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:32,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:32,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818635677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:32,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:32,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824655187] [2021-06-05 23:29:32,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:32,956 INFO L87 Difference]: Start difference. First operand 3622 states and 9154 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:29:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:34,172 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-06-05 23:29:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:29:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 [2021-06-05 23:29:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:34,175 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 23:29:34,175 INFO L226 Difference]: Without dead ends: 3899 [2021-06-05 23:29:34,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:29:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-06-05 23:29:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-06-05 23:29:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 2.5263445263445266) internal successors, (9254), 3663 states have internal predecessors, (9254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-06-05 23:29:34,209 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-06-05 23:29:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:34,209 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-06-05 23:29:34,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:29:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-06-05 23:29:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:34,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:34,212 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:34,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 23:29:34,412 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:34,412 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-06-05 23:29:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3021536] [2021-06-05 23:29:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:34,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:34,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3021536] [2021-06-05 23:29:34,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3021536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:34,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383169980] [2021-06-05 23:29:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:34,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:34,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:34,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:34,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:34,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:34,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:34,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:34,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:34,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:34,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:34,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383169980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:34,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:34,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:34,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467773006] [2021-06-05 23:29:34,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:34,873 INFO L87 Difference]: Start difference. First operand 3664 states and 9254 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:29:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:35,687 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-06-05 23:29:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:29:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 [2021-06-05 23:29:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:35,691 INFO L225 Difference]: With dead ends: 4402 [2021-06-05 23:29:35,691 INFO L226 Difference]: Without dead ends: 4365 [2021-06-05 23:29:35,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:29:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-06-05 23:29:35,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-06-05 23:29:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.5322997416020674) internal successors, (9800), 3870 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-06-05 23:29:35,729 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-06-05 23:29:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:35,729 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-06-05 23:29:35,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:29:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-06-05 23:29:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:35,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:35,733 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:35,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 23:29:35,940 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-06-05 23:29:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:35,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208348035] [2021-06-05 23:29:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:36,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:36,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208348035] [2021-06-05 23:29:36,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208348035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:36,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723885085] [2021-06-05 23:29:36,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:36,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:29:36,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:36,195 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:29:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:36,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:36,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 157 [2021-06-05 23:29:36,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:29:36,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:36,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:36,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-06-05 23:29:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:36,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723885085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:36,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:36,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 23:29:36,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937937689] [2021-06-05 23:29:36,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:29:36,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:29:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:29:36,766 INFO L87 Difference]: Start difference. First operand 3871 states and 9800 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:29:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:39,078 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-06-05 23:29:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:29:39,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 [2021-06-05 23:29:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:39,082 INFO L225 Difference]: With dead ends: 4724 [2021-06-05 23:29:39,082 INFO L226 Difference]: Without dead ends: 4685 [2021-06-05 23:29:39,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2183.2ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:29:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-06-05 23:29:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-06-05 23:29:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.524805447470817) internal successors, (10382), 4112 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-06-05 23:29:39,119 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-06-05 23:29:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:39,119 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-06-05 23:29:39,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:29:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-06-05 23:29:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:39,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:39,123 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:39,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 23:29:39,333 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-06-05 23:29:39,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:39,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527994934] [2021-06-05 23:29:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:39,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527994934] [2021-06-05 23:29:39,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527994934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:39,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040978229] [2021-06-05 23:29:39,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:39,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:39,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:39,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:39,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:39,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:39,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:39,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:39,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040978229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891358643] [2021-06-05 23:29:39,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:39,814 INFO L87 Difference]: Start difference. First operand 4113 states and 10382 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:41,614 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-06-05 23:29:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:29:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:41,619 INFO L225 Difference]: With dead ends: 4964 [2021-06-05 23:29:41,619 INFO L226 Difference]: Without dead ends: 4899 [2021-06-05 23:29:41,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1596.5ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:29:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-06-05 23:29:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-06-05 23:29:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.5202092249167856) internal successors, (10600), 4206 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-06-05 23:29:41,656 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-06-05 23:29:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:41,656 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-06-05 23:29:41,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-06-05 23:29:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:41,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:41,660 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:41,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 23:29:41,860 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:41,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-06-05 23:29:41,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:41,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829162074] [2021-06-05 23:29:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:42,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:42,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829162074] [2021-06-05 23:29:42,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829162074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619129380] [2021-06-05 23:29:42,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:42,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:29:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:42,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:42,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:42,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:42,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:42,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:42,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:42,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:42,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:42,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:42,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619129380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:42,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:42,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405784616] [2021-06-05 23:29:42,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:42,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:42,345 INFO L87 Difference]: Start difference. First operand 4207 states and 10600 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:43,975 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-06-05 23:29:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:29:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:43,980 INFO L225 Difference]: With dead ends: 4760 [2021-06-05 23:29:43,980 INFO L226 Difference]: Without dead ends: 4720 [2021-06-05 23:29:43,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1413.6ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:29:43,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-06-05 23:29:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-06-05 23:29:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 2.5155513666352496) internal successors, (10676), 4244 states have internal predecessors, (10676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-06-05 23:29:44,018 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-06-05 23:29:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:44,018 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-06-05 23:29:44,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-06-05 23:29:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:44,021 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:44,021 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:44,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:44,237 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:44,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:44,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-06-05 23:29:44,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:44,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136400727] [2021-06-05 23:29:44,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:44,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:44,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136400727] [2021-06-05 23:29:44,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136400727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:44,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631333740] [2021-06-05 23:29:44,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:44,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:29:44,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:44,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:44,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:44,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:44,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:44,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:44,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:44,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631333740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:44,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:44,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:44,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341584564] [2021-06-05 23:29:44,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:44,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:44,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:44,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:44,796 INFO L87 Difference]: Start difference. First operand 4245 states and 10676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:46,725 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-06-05 23:29:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:29:46,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:46,729 INFO L225 Difference]: With dead ends: 4832 [2021-06-05 23:29:46,729 INFO L226 Difference]: Without dead ends: 4777 [2021-06-05 23:29:46,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1762.6ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:29:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-05 23:29:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-06-05 23:29:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.5127491886879927) internal successors, (10840), 4314 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-06-05 23:29:46,767 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-06-05 23:29:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:46,767 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-06-05 23:29:46,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-06-05 23:29:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:46,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:46,770 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:46,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:46,970 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-06-05 23:29:46,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:46,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669268617] [2021-06-05 23:29:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:47,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669268617] [2021-06-05 23:29:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669268617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:47,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85387198] [2021-06-05 23:29:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:47,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:47,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:47,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:47,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:47,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:47,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:47,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:47,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:47,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:47,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:47,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:47,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85387198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:47,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:47,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:29:47,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109688702] [2021-06-05 23:29:47,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:47,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:47,555 INFO L87 Difference]: Start difference. First operand 4315 states and 10840 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:29:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:49,078 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-06-05 23:29:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:29:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:29:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:49,083 INFO L225 Difference]: With dead ends: 5809 [2021-06-05 23:29:49,083 INFO L226 Difference]: Without dead ends: 5760 [2021-06-05 23:29:49,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1399.2ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:29:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-06-05 23:29:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-06-05 23:29:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 2.5130002260908886) internal successors, (11115), 4423 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-06-05 23:29:49,129 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-06-05 23:29:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:49,129 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-06-05 23:29:49,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:29:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-06-05 23:29:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:49,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:49,132 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:49,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:49,333 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-06-05 23:29:49,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:49,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422351052] [2021-06-05 23:29:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:49,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:49,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422351052] [2021-06-05 23:29:49,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422351052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:49,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862218651] [2021-06-05 23:29:49,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:49,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:49,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:49,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:49,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:49,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:49,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:49,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:49,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:49,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862218651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:49,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:49,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:29:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733971839] [2021-06-05 23:29:49,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:49,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:49,910 INFO L87 Difference]: Start difference. First operand 4424 states and 11115 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:29:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:51,232 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-06-05 23:29:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:29:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:29:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:51,237 INFO L225 Difference]: With dead ends: 5600 [2021-06-05 23:29:51,237 INFO L226 Difference]: Without dead ends: 5549 [2021-06-05 23:29:51,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1274.8ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:29:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-06-05 23:29:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-06-05 23:29:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 2.507372654155496) internal successors, (11223), 4476 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-06-05 23:29:51,279 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-06-05 23:29:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:51,279 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-06-05 23:29:51,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:29:51,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-06-05 23:29:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:51,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:51,283 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:51,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:51,483 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-06-05 23:29:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:51,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629340994] [2021-06-05 23:29:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:51,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629340994] [2021-06-05 23:29:51,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629340994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416152631] [2021-06-05 23:29:51,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:51,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:29:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:51,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:29:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:52,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:52,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:52,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:52,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-06-05 23:29:52,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 23:29:52,729 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-06-05 23:29:52,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:52,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-05 23:29:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:52,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416152631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:52,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:52,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 23:29:52,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719757769] [2021-06-05 23:29:52,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:29:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:29:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:52,833 INFO L87 Difference]: Start difference. First operand 4477 states and 11223 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-06-05 23:29:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:55,165 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-06-05 23:29:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:29:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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 [2021-06-05 23:29:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:55,170 INFO L225 Difference]: With dead ends: 5628 [2021-06-05 23:29:55,171 INFO L226 Difference]: Without dead ends: 5604 [2021-06-05 23:29:55,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2239.8ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:29:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-06-05 23:29:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-06-05 23:29:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.5064674397859052) internal successors, (11239), 4484 states have internal predecessors, (11239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-06-05 23:29:55,216 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-06-05 23:29:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:55,216 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-06-05 23:29:55,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 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) [2021-06-05 23:29:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-06-05 23:29:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:55,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:55,220 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:55,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:55,420 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-06-05 23:29:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086348098] [2021-06-05 23:29:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:55,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:55,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086348098] [2021-06-05 23:29:55,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086348098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:55,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007150522] [2021-06-05 23:29:55,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:55,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:55,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:55,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:55,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:55,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:55,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:55,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:55,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:55,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:55,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:55,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:55,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007150522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:55,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:55,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:29:55,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428788573] [2021-06-05 23:29:55,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:29:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:29:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:55,936 INFO L87 Difference]: Start difference. First operand 4485 states and 11239 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:57,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:57,643 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-06-05 23:29:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:29:57,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:29:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:57,648 INFO L225 Difference]: With dead ends: 5013 [2021-06-05 23:29:57,648 INFO L226 Difference]: Without dead ends: 4984 [2021-06-05 23:29:57,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1614.4ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:29:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-06-05 23:29:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-06-05 23:29:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.4972862957937583) internal successors, (11043), 4422 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-06-05 23:29:57,688 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-06-05 23:29:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:57,688 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-06-05 23:29:57,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-06-05 23:29:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:57,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:57,692 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:57,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 23:29:57,892 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-06-05 23:29:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:57,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864904495] [2021-06-05 23:29:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:58,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864904495] [2021-06-05 23:29:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864904495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:58,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860545961] [2021-06-05 23:29:58,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:58,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:29:58,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:58,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:29:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:58,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:29:58,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:29:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:29:58,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:58,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:58,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:29:58,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:29:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:58,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860545961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:58,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:58,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:29:58,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042566281] [2021-06-05 23:29:58,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:58,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:58,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:58,394 INFO L87 Difference]: Start difference. First operand 4423 states and 11043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:29:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:59,648 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-06-05 23:29:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:29:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 [2021-06-05 23:29:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:59,663 INFO L225 Difference]: With dead ends: 4995 [2021-06-05 23:29:59,663 INFO L226 Difference]: Without dead ends: 4959 [2021-06-05 23:29:59,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1077.9ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:29:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-06-05 23:29:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-06-05 23:29:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.503015941404567) internal successors, (11619), 4642 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-06-05 23:29:59,702 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-06-05 23:29:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:59,702 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-06-05 23:29:59,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:29:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-06-05 23:29:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:29:59,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:59,706 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:59,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 23:29:59,906 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-06-05 23:29:59,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:59,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731338402] [2021-06-05 23:29:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731338402] [2021-06-05 23:30:00,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731338402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300149269] [2021-06-05 23:30:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:00,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:30:00,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:00,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:30:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:00,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-06-05 23:30:00,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:30:00,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:00,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:00,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-06-05 23:30:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:00,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300149269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:00,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:00,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 23:30:00,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231516114] [2021-06-05 23:30:00,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:30:00,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:30:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:30:00,712 INFO L87 Difference]: Start difference. First operand 4643 states and 11619 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 23:30:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:02,684 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-06-05 23:30:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:30:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 [2021-06-05 23:30:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:02,689 INFO L225 Difference]: With dead ends: 5869 [2021-06-05 23:30:02,689 INFO L226 Difference]: Without dead ends: 5852 [2021-06-05 23:30:02,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1665.0ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:30:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-05 23:30:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-06-05 23:30:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.5053694158075603) internal successors, (11665), 4656 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-06-05 23:30:02,739 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-06-05 23:30:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:02,739 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-06-05 23:30:02,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 23:30:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-06-05 23:30:02,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:02,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:02,742 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:02,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 23:30:02,945 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:02,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-06-05 23:30:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:02,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432830104] [2021-06-05 23:30:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:03,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:03,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432830104] [2021-06-05 23:30:03,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432830104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:03,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596274472] [2021-06-05 23:30:03,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:03,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:30:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:03,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:03,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:03,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:30:03,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:03,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:03,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:03,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:30:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:03,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596274472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:03,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:03,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 23:30:03,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060710651] [2021-06-05 23:30:03,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:30:03,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:03,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:30:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:30:03,424 INFO L87 Difference]: Start difference. First operand 4657 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:30:04,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:04,625 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-06-05 23:30:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:30:04,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 [2021-06-05 23:30:04,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:04,630 INFO L225 Difference]: With dead ends: 5656 [2021-06-05 23:30:04,630 INFO L226 Difference]: Without dead ends: 5619 [2021-06-05 23:30:04,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1105.1ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:30:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-06-05 23:30:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-06-05 23:30:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.5057621222004784) internal successors, (11524), 4599 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-06-05 23:30:04,679 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-06-05 23:30:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:04,680 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-06-05 23:30:04,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 23:30:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-06-05 23:30:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:04,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:04,683 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:04,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 23:30:04,897 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-06-05 23:30:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511652023] [2021-06-05 23:30:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:05,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:05,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511652023] [2021-06-05 23:30:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511652023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:05,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029417931] [2021-06-05 23:30:05,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:30:05,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:30:05,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:05,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:05,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:05,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:05,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:30:05,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:05,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:05,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:05,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:30:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029417931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:05,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:05,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:30:05,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008932952] [2021-06-05 23:30:05,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:05,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:05,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:05,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:05,453 INFO L87 Difference]: Start difference. First operand 4600 states and 11524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:06,930 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-06-05 23:30:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:30:06,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:30:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:06,935 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 23:30:06,935 INFO L226 Difference]: Without dead ends: 5199 [2021-06-05 23:30:06,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1440.1ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:30:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-06-05 23:30:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-06-05 23:30:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5053579082726105) internal successors, (11690), 4666 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-06-05 23:30:06,984 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-06-05 23:30:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:06,984 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-06-05 23:30:06,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-06-05 23:30:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:06,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:06,987 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:07,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 23:30:07,188 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-06-05 23:30:07,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:07,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061648375] [2021-06-05 23:30:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:07,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:07,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061648375] [2021-06-05 23:30:07,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061648375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:07,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510351912] [2021-06-05 23:30:07,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:07,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:30:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:07,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:30:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:07,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:07,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:07,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 141 [2021-06-05 23:30:07,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-06-05 23:30:07,980 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-06-05 23:30:07,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:07,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-06-05 23:30:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:08,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510351912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:08,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:08,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 23:30:08,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085308141] [2021-06-05 23:30:08,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:30:08,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:08,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:30:08,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:30:08,068 INFO L87 Difference]: Start difference. First operand 4667 states and 11690 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:30:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:10,056 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-06-05 23:30:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:30:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 [2021-06-05 23:30:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:10,062 INFO L225 Difference]: With dead ends: 5151 [2021-06-05 23:30:10,062 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 23:30:10,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1795.0ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:30:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 23:30:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-06-05 23:30:10,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.507494646680942) internal successors, (11710), 4670 states have internal predecessors, (11710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-06-05 23:30:10,103 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-06-05 23:30:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:10,103 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-06-05 23:30:10,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:30:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-06-05 23:30:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:10,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:10,107 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:10,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:10,307 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-06-05 23:30:10,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:10,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161023779] [2021-06-05 23:30:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:10,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161023779] [2021-06-05 23:30:10,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161023779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143748345] [2021-06-05 23:30:10,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:10,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:30:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:10,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:30:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:10,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:10,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:10,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:10,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:10,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:30:10,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:10,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:10,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:10,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:30:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:10,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143748345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:10,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:10,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:30:10,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603153997] [2021-06-05 23:30:10,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:10,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:10,750 INFO L87 Difference]: Start difference. First operand 4671 states and 11710 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:30:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:11,767 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-06-05 23:30:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:30:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 [2021-06-05 23:30:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:11,771 INFO L225 Difference]: With dead ends: 5215 [2021-06-05 23:30:11,771 INFO L226 Difference]: Without dead ends: 5184 [2021-06-05 23:30:11,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 829.9ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:30:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-06-05 23:30:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-06-05 23:30:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 2.5177349097697572) internal successors, (12138), 4821 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-06-05 23:30:11,816 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-06-05 23:30:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:11,817 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-06-05 23:30:11,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 23:30:11,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-06-05 23:30:11,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:11,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:11,820 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:12,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:12,021 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-06-05 23:30:12,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:12,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614514185] [2021-06-05 23:30:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:12,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:12,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614514185] [2021-06-05 23:30:12,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614514185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:12,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682033718] [2021-06-05 23:30:12,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:12,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:30:12,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:12,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:30:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:12,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:12,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:12,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:30:12,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:12,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:12,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:12,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:30:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:12,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682033718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:12,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:12,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 23:30:12,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361629823] [2021-06-05 23:30:12,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:12,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:12,474 INFO L87 Difference]: Start difference. First operand 4822 states and 12138 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:14,062 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-06-05 23:30:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:30:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:30:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:14,068 INFO L225 Difference]: With dead ends: 5370 [2021-06-05 23:30:14,068 INFO L226 Difference]: Without dead ends: 5304 [2021-06-05 23:30:14,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1452.0ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:30:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-06-05 23:30:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-06-05 23:30:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.5141981613891726) internal successors, (12307), 4895 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-06-05 23:30:14,115 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-06-05 23:30:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:14,115 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-06-05 23:30:14,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-06-05 23:30:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:14,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:14,135 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:14,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 23:30:14,336 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-06-05 23:30:14,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:14,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741200032] [2021-06-05 23:30:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:14,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:14,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741200032] [2021-06-05 23:30:14,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741200032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:14,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037737855] [2021-06-05 23:30:14,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:14,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:30:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:14,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:30:14,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:14,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:14,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2021-06-05 23:30:15,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:30:15,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:15,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:15,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-06-05 23:30:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:15,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037737855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:15,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:15,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 23:30:15,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175669515] [2021-06-05 23:30:15,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:30:15,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:30:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:30:15,157 INFO L87 Difference]: Start difference. First operand 4896 states and 12307 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:30:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:16,849 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-06-05 23:30:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:30:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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 [2021-06-05 23:30:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:16,854 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 23:30:16,854 INFO L226 Difference]: Without dead ends: 5223 [2021-06-05 23:30:16,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1574.8ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:30:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-06-05 23:30:16,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-06-05 23:30:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.5122000813338756) internal successors, (12355), 4918 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-06-05 23:30:16,898 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-06-05 23:30:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:16,898 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-06-05 23:30:16,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 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) [2021-06-05 23:30:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-06-05 23:30:16,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:30:16,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:16,901 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:17,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 23:30:17,102 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-06-05 23:30:17,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:17,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52000701] [2021-06-05 23:30:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:17,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:17,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52000701] [2021-06-05 23:30:17,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52000701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:17,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937996224] [2021-06-05 23:30:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:17,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:30:17,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:17,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 23:30:17,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:17,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:17,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:17,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 23:30:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937996224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 23:30:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987228671] [2021-06-05 23:30:17,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:30:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:30:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:30:17,600 INFO L87 Difference]: Start difference. First operand 4919 states and 12355 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:19,283 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-06-05 23:30:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:30:19,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:30:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:19,288 INFO L225 Difference]: With dead ends: 5304 [2021-06-05 23:30:19,288 INFO L226 Difference]: Without dead ends: 5284 [2021-06-05 23:30:19,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1545.6ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:30:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-05 23:30:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-06-05 23:30:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.51401492236338) internal successors, (12467), 4959 states have internal predecessors, (12467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-06-05 23:30:19,343 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-06-05 23:30:19,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:19,344 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-06-05 23:30:19,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-06-05 23:30:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:19,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:19,347 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:19,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:19,548 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:19,548 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-06-05 23:30:19,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:19,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102652720] [2021-06-05 23:30:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:19,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:19,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102652720] [2021-06-05 23:30:19,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102652720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:19,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264359394] [2021-06-05 23:30:19,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:19,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:30:19,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:19,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264359394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:19,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:19,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:30:19,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724347019] [2021-06-05 23:30:19,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:30:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:19,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:30:19,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:30:19,827 INFO L87 Difference]: Start difference. First operand 4960 states and 12467 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:20,809 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-06-05 23:30:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:30:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:20,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:20,814 INFO L225 Difference]: With dead ends: 6004 [2021-06-05 23:30:20,814 INFO L226 Difference]: Without dead ends: 6004 [2021-06-05 23:30:20,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:30:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-06-05 23:30:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-06-05 23:30:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.511406844106464) internal successors, (11889), 4734 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-06-05 23:30:20,857 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-06-05 23:30:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:20,857 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-06-05 23:30:20,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-06-05 23:30:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:20,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:20,861 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:21,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 23:30:21,062 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-06-05 23:30:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:21,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241317904] [2021-06-05 23:30:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:21,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241317904] [2021-06-05 23:30:21,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241317904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171410493] [2021-06-05 23:30:21,134 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:21,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:30:21,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:21,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171410493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:21,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:21,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:30:21,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848241261] [2021-06-05 23:30:21,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:30:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:30:21,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:30:21,351 INFO L87 Difference]: Start difference. First operand 4735 states and 11889 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:22,766 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-06-05 23:30:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:30:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:22,772 INFO L225 Difference]: With dead ends: 7971 [2021-06-05 23:30:22,772 INFO L226 Difference]: Without dead ends: 7867 [2021-06-05 23:30:22,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 23:30:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-06-05 23:30:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-06-05 23:30:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.5299424184261037) internal successors, (13181), 5210 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-06-05 23:30:22,836 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-06-05 23:30:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:22,836 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-06-05 23:30:22,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-06-05 23:30:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:22,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:22,840 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:23,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:23,040 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:23,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:23,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-06-05 23:30:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:23,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709743331] [2021-06-05 23:30:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:23,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:23,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709743331] [2021-06-05 23:30:23,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709743331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:23,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186648755] [2021-06-05 23:30:23,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:23,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:30:23,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:23,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186648755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:23,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:23,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 23:30:23,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860682752] [2021-06-05 23:30:23,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:23,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:23,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:23,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:23,271 INFO L87 Difference]: Start difference. First operand 5211 states and 13181 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:24,446 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-06-05 23:30:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:30:24,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:24,456 INFO L225 Difference]: With dead ends: 9415 [2021-06-05 23:30:24,456 INFO L226 Difference]: Without dead ends: 9411 [2021-06-05 23:30:24,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1022.3ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:30:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-06-05 23:30:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-06-05 23:30:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 2.5451089340546864) internal successors, (17406), 6839 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-06-05 23:30:24,550 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-06-05 23:30:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:24,550 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-06-05 23:30:24,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-06-05 23:30:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:24,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:24,555 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:24,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:24,766 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-06-05 23:30:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:24,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925038124] [2021-06-05 23:30:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:24,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:24,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925038124] [2021-06-05 23:30:24,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925038124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:24,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354058817] [2021-06-05 23:30:24,815 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:24,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:30:24,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:24,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354058817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:24,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:24,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 23:30:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979959681] [2021-06-05 23:30:24,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:24,999 INFO L87 Difference]: Start difference. First operand 6840 states and 17406 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:25,879 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-06-05 23:30:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:30:25,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:25,885 INFO L225 Difference]: With dead ends: 7287 [2021-06-05 23:30:25,885 INFO L226 Difference]: Without dead ends: 7283 [2021-06-05 23:30:25,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 815.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:30:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-06-05 23:30:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-06-05 23:30:25,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 2.5457362053703156) internal successors, (17255), 6778 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-06-05 23:30:25,946 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-06-05 23:30:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:25,947 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-06-05 23:30:25,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-06-05 23:30:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:25,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:25,951 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:26,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-06-05 23:30:26,151 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-06-05 23:30:26,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:26,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107031426] [2021-06-05 23:30:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:26,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:26,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107031426] [2021-06-05 23:30:26,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107031426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:26,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094370174] [2021-06-05 23:30:26,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:26,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:30:26,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:26,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:26,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094370174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:26,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:26,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 23:30:26,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230232919] [2021-06-05 23:30:26,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:26,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:26,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:26,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:26,381 INFO L87 Difference]: Start difference. First operand 6779 states and 17255 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:27,070 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-06-05 23:30:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:30:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:27,077 INFO L225 Difference]: With dead ends: 8864 [2021-06-05 23:30:27,078 INFO L226 Difference]: Without dead ends: 8852 [2021-06-05 23:30:27,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:30:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-06-05 23:30:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-06-05 23:30:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 7048 states have (on average 2.555192962542565) internal successors, (18009), 7048 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-06-05 23:30:27,195 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-06-05 23:30:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:27,195 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-06-05 23:30:27,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-06-05 23:30:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:27,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:27,200 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:27,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:27,400 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-06-05 23:30:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:27,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578124117] [2021-06-05 23:30:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:27,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578124117] [2021-06-05 23:30:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578124117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:27,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479247162] [2021-06-05 23:30:27,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:27,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:27,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479247162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:27,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:27,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 23:30:27,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618861148] [2021-06-05 23:30:27,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:30:27,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:30:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:30:27,634 INFO L87 Difference]: Start difference. First operand 7049 states and 18009 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 23:30:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:28,515 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-06-05 23:30:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:30:28,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:28,523 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 23:30:28,523 INFO L226 Difference]: Without dead ends: 8183 [2021-06-05 23:30:28,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 802.1ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:30:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-06-05 23:30:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-06-05 23:30:28,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 2.56353591160221) internal successors, (18560), 7240 states have internal predecessors, (18560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-06-05 23:30:28,599 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-06-05 23:30:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:28,599 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-06-05 23:30:28,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 23:30:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-06-05 23:30:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:28,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:28,603 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:28,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:28,804 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-06-05 23:30:28,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:28,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121187800] [2021-06-05 23:30:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:28,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:28,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121187800] [2021-06-05 23:30:28,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121187800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:28,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66902741] [2021-06-05 23:30:28,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:28,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:30:28,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:28,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:28,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:29,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66902741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:29,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:29,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 23:30:29,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505089520] [2021-06-05 23:30:29,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:29,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:29,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:29,069 INFO L87 Difference]: Start difference. First operand 7241 states and 18560 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:29,960 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-06-05 23:30:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:30:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:29,969 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 23:30:29,969 INFO L226 Difference]: Without dead ends: 8722 [2021-06-05 23:30:29,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 803.5ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:30:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-06-05 23:30:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-06-05 23:30:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.5699115044247787) internal successors, (18876), 7345 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-06-05 23:30:30,049 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-06-05 23:30:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:30,050 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-06-05 23:30:30,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-06-05 23:30:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:30,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:30,054 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:30,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 23:30:30,255 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-06-05 23:30:30,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:30,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723438711] [2021-06-05 23:30:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:30,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:30,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723438711] [2021-06-05 23:30:30,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723438711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:30,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401448406] [2021-06-05 23:30:30,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:30,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:30:30,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401448406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:30,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:30,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:30:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790718195] [2021-06-05 23:30:30,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:30:30,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:30,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:30:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:30:30,532 INFO L87 Difference]: Start difference. First operand 7346 states and 18876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:31,420 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-06-05 23:30:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:30:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:31,428 INFO L225 Difference]: With dead ends: 9131 [2021-06-05 23:30:31,429 INFO L226 Difference]: Without dead ends: 9101 [2021-06-05 23:30:31,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:30:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-06-05 23:30:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-06-05 23:30:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.5696751983236044) internal successors, (17168), 6681 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-06-05 23:30:31,514 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-06-05 23:30:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:31,514 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-06-05 23:30:31,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:31,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-06-05 23:30:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:31,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:31,518 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:31,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 23:30:31,719 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:31,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:31,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-06-05 23:30:31,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:31,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883818254] [2021-06-05 23:30:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:31,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:31,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883818254] [2021-06-05 23:30:31,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883818254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:31,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334199719] [2021-06-05 23:30:31,797 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:31,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:30:31,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:32,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334199719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:32,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:32,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:30:32,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941625793] [2021-06-05 23:30:32,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:30:32,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:30:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:30:32,009 INFO L87 Difference]: Start difference. First operand 6682 states and 17168 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-06-05 23:30:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:33,015 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-06-05 23:30:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:30:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:33,022 INFO L225 Difference]: With dead ends: 8276 [2021-06-05 23:30:33,022 INFO L226 Difference]: Without dead ends: 8276 [2021-06-05 23:30:33,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 873.2ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:30:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-05 23:30:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-06-05 23:30:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 2.554284767114205) internal successors, (15410), 6033 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-06-05 23:30:33,089 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-06-05 23:30:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:33,089 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-06-05 23:30:33,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-06-05 23:30:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-06-05 23:30:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:33,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:33,093 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:33,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 23:30:33,294 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-06-05 23:30:33,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:33,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897198341] [2021-06-05 23:30:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:33,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:33,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897198341] [2021-06-05 23:30:33,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897198341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:33,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174664908] [2021-06-05 23:30:33,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:33,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:30:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:33,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:33,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174664908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:33,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:33,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:30:33,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423989007] [2021-06-05 23:30:33,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:30:33,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:33,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:30:33,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:30:33,554 INFO L87 Difference]: Start difference. First operand 6034 states and 15410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:34,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:34,589 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-06-05 23:30:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:30:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:34,595 INFO L225 Difference]: With dead ends: 7180 [2021-06-05 23:30:34,595 INFO L226 Difference]: Without dead ends: 7114 [2021-06-05 23:30:34,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:30:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-06-05 23:30:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-06-05 23:30:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.553177368508379) internal successors, (15388), 6027 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) [2021-06-05 23:30:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-06-05 23:30:34,659 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-06-05 23:30:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:34,659 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-06-05 23:30:34,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-06-05 23:30:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:34,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:34,663 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:34,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:34,863 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:34,863 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-06-05 23:30:34,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:34,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137074858] [2021-06-05 23:30:34,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:34,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:34,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137074858] [2021-06-05 23:30:34,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137074858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:34,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166150102] [2021-06-05 23:30:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:34,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:30:34,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:34,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:34,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166150102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:35,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:35,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:30:35,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824701416] [2021-06-05 23:30:35,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:30:35,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:30:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:30:35,119 INFO L87 Difference]: Start difference. First operand 6028 states and 15388 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-06-05 23:30:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:36,219 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-06-05 23:30:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:30:36,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:36,225 INFO L225 Difference]: With dead ends: 8027 [2021-06-05 23:30:36,225 INFO L226 Difference]: Without dead ends: 8027 [2021-06-05 23:30:36,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:30:36,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-06-05 23:30:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-06-05 23:30:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.526865945351183) internal successors, (13779), 5453 states have internal predecessors, (13779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:36,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-06-05 23:30:36,284 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-06-05 23:30:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:36,285 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-06-05 23:30:36,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-06-05 23:30:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-06-05 23:30:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:36,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:36,288 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:36,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 23:30:36,488 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-06-05 23:30:36,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:36,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426648451] [2021-06-05 23:30:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:36,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426648451] [2021-06-05 23:30:36,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426648451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:36,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946700583] [2021-06-05 23:30:36,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:36,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946700583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:36,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:36,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 23:30:36,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651050134] [2021-06-05 23:30:36,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:36,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:36,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:36,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:36,732 INFO L87 Difference]: Start difference. First operand 5454 states and 13779 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:37,606 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-06-05 23:30:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:30:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:37,612 INFO L225 Difference]: With dead ends: 6472 [2021-06-05 23:30:37,612 INFO L226 Difference]: Without dead ends: 6433 [2021-06-05 23:30:37,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:30:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-05 23:30:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-06-05 23:30:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5241151659636896) internal successors, (13764), 5453 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-06-05 23:30:37,684 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-06-05 23:30:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:37,684 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-06-05 23:30:37,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-06-05 23:30:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:37,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:37,688 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:37,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 23:30:37,888 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:37,889 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-06-05 23:30:37,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:37,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999677929] [2021-06-05 23:30:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:37,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:37,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999677929] [2021-06-05 23:30:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999677929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786349216] [2021-06-05 23:30:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:37,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:30:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:38,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786349216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:38,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:38,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 23:30:38,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321587741] [2021-06-05 23:30:38,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:38,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:38,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:38,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:38,140 INFO L87 Difference]: Start difference. First operand 5454 states and 13764 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-06-05 23:30:39,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:39,309 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-06-05 23:30:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:30:39,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:39,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:39,316 INFO L225 Difference]: With dead ends: 8061 [2021-06-05 23:30:39,316 INFO L226 Difference]: Without dead ends: 8061 [2021-06-05 23:30:39,317 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1005.3ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 23:30:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-06-05 23:30:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-06-05 23:30:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 2.5155217965653898) internal successors, (15234), 6056 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-06-05 23:30:39,382 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-06-05 23:30:39,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:39,382 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-06-05 23:30:39,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-06-05 23:30:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-06-05 23:30:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:39,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:39,386 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:39,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:39,587 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-06-05 23:30:39,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:39,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186397821] [2021-06-05 23:30:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:39,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186397821] [2021-06-05 23:30:39,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186397821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251019085] [2021-06-05 23:30:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:39,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:30:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:39,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251019085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:39,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:39,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 23:30:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158248780] [2021-06-05 23:30:39,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:30:39,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:30:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:30:39,848 INFO L87 Difference]: Start difference. First operand 6057 states and 15234 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 23:30:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:40,683 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-06-05 23:30:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:30:40,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:40,690 INFO L225 Difference]: With dead ends: 6889 [2021-06-05 23:30:40,690 INFO L226 Difference]: Without dead ends: 6871 [2021-06-05 23:30:40,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:30:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-05 23:30:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-06-05 23:30:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 2.517774851876234) internal successors, (15298), 6076 states have internal predecessors, (15298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-06-05 23:30:40,749 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-06-05 23:30:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:40,749 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-06-05 23:30:40,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 23:30:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-06-05 23:30:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:40,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:40,752 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:40,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:40,953 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-06-05 23:30:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666055262] [2021-06-05 23:30:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:41,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:41,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666055262] [2021-06-05 23:30:41,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666055262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:41,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765591547] [2021-06-05 23:30:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:41,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:30:41,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:41,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765591547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:41,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:41,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 23:30:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850869943] [2021-06-05 23:30:41,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:30:41,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:41,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:30:41,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:30:41,193 INFO L87 Difference]: Start difference. First operand 6077 states and 15298 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:42,395 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-06-05 23:30:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:30:42,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:42,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:42,405 INFO L225 Difference]: With dead ends: 10330 [2021-06-05 23:30:42,406 INFO L226 Difference]: Without dead ends: 10330 [2021-06-05 23:30:42,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1058.5ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:30:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-06-05 23:30:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-06-05 23:30:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9090 states have (on average 2.5674367436743672) internal successors, (23338), 9090 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-06-05 23:30:42,516 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-06-05 23:30:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:42,516 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-06-05 23:30:42,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:42,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-06-05 23:30:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:42,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:42,522 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:42,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:42,722 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:42,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:42,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-06-05 23:30:42,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:42,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666688021] [2021-06-05 23:30:42,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:42,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:42,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666688021] [2021-06-05 23:30:42,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666688021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:42,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771004434] [2021-06-05 23:30:42,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:42,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:30:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:42,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771004434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:42,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:42,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 23:30:42,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861625659] [2021-06-05 23:30:42,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:30:42,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:30:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:30:42,956 INFO L87 Difference]: Start difference. First operand 9091 states and 23338 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:43,762 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-06-05 23:30:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:30:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:43,771 INFO L225 Difference]: With dead ends: 10140 [2021-06-05 23:30:43,771 INFO L226 Difference]: Without dead ends: 10136 [2021-06-05 23:30:43,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:30:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-05 23:30:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-06-05 23:30:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 8994 states have (on average 2.5654881031798977) internal successors, (23074), 8994 states have internal predecessors, (23074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-06-05 23:30:43,873 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-06-05 23:30:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:43,874 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-06-05 23:30:43,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-06-05 23:30:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:43,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:43,879 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:44,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:44,080 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:44,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-06-05 23:30:44,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:44,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867630341] [2021-06-05 23:30:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:44,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:44,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867630341] [2021-06-05 23:30:44,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867630341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:44,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650008786] [2021-06-05 23:30:44,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:44,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:30:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:44,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650008786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:44,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:44,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 23:30:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215846192] [2021-06-05 23:30:44,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:30:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:30:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:30:44,309 INFO L87 Difference]: Start difference. First operand 8995 states and 23074 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 23:30:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:45,080 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-06-05 23:30:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:30:45,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:45,089 INFO L225 Difference]: With dead ends: 10548 [2021-06-05 23:30:45,089 INFO L226 Difference]: Without dead ends: 10536 [2021-06-05 23:30:45,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:30:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-06-05 23:30:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-06-05 23:30:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9183 states, 9182 states have (on average 2.5686125027227185) internal successors, (23585), 9182 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-06-05 23:30:45,216 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-06-05 23:30:45,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:45,216 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-06-05 23:30:45,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 23:30:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-06-05 23:30:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:45,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:45,222 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:45,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 23:30:45,423 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-06-05 23:30:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:45,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88335417] [2021-06-05 23:30:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:45,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88335417] [2021-06-05 23:30:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88335417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338874499] [2021-06-05 23:30:45,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:45,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338874499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:45,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:45,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 23:30:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341272710] [2021-06-05 23:30:45,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:30:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:30:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:30:45,661 INFO L87 Difference]: Start difference. First operand 9183 states and 23585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:46,469 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-06-05 23:30:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:30:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:46,480 INFO L225 Difference]: With dead ends: 11364 [2021-06-05 23:30:46,481 INFO L226 Difference]: Without dead ends: 11344 [2021-06-05 23:30:46,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 706.2ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:30:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-06-05 23:30:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-06-05 23:30:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.574075899457861) internal successors, (26114), 10145 states have internal predecessors, (26114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:46,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-06-05 23:30:46,604 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-06-05 23:30:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:46,604 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-06-05 23:30:46,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-06-05 23:30:46,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:46,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:46,611 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:46,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 23:30:46,811 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-06-05 23:30:46,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:46,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605443459] [2021-06-05 23:30:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:30:46,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605443459] [2021-06-05 23:30:46,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605443459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212726937] [2021-06-05 23:30:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:46,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:30:46,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:47,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212726937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:47,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:47,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:30:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483162024] [2021-06-05 23:30:47,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:30:47,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:30:47,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:30:47,099 INFO L87 Difference]: Start difference. First operand 10146 states and 26114 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:47,992 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-06-05 23:30:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:30:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:48,004 INFO L225 Difference]: With dead ends: 12734 [2021-06-05 23:30:48,004 INFO L226 Difference]: Without dead ends: 12706 [2021-06-05 23:30:48,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:30:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-06-05 23:30:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-06-05 23:30:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 2.579330294530154) internal successors, (29425), 11408 states have internal predecessors, (29425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-06-05 23:30:48,150 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-06-05 23:30:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:48,150 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-06-05 23:30:48,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-06-05 23:30:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:30:48,158 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:48,158 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:48,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 23:30:48,361 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-06-05 23:30:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240500809] [2021-06-05 23:30:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:48,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:48,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240500809] [2021-06-05 23:30:48,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240500809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:48,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830814823] [2021-06-05 23:30:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:48,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:30:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:30:48,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:48,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830814823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:48,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:48,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:30:48,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659101939] [2021-06-05 23:30:48,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:30:48,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:48,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:30:48,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:30:48,672 INFO L87 Difference]: Start difference. First operand 11409 states and 29425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:49,682 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-06-05 23:30:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:30:49,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:30:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:49,694 INFO L225 Difference]: With dead ends: 12970 [2021-06-05 23:30:49,695 INFO L226 Difference]: Without dead ends: 12934 [2021-06-05 23:30:49,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:30:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-06-05 23:30:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-06-05 23:30:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.5852185745875147) internal successors, (30397), 11758 states have internal predecessors, (30397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-06-05 23:30:49,837 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-06-05 23:30:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:49,837 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-06-05 23:30:49,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-06-05 23:30:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:30:49,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:49,845 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:50,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 23:30:50,045 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-06-05 23:30:50,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:50,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596492116] [2021-06-05 23:30:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:50,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:50,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596492116] [2021-06-05 23:30:50,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596492116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:50,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264742823] [2021-06-05 23:30:50,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:50,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:30:50,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:50,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:30:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:50,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:50,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:50,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:30:50,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:50,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:50,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:50,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:30:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:50,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264742823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:50,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:50,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 23:30:50,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446375388] [2021-06-05 23:30:50,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:30:50,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:30:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:30:50,819 INFO L87 Difference]: Start difference. First operand 11759 states and 30397 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:53,232 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-06-05 23:30:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:30:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:30:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:53,246 INFO L225 Difference]: With dead ends: 14875 [2021-06-05 23:30:53,246 INFO L226 Difference]: Without dead ends: 14868 [2021-06-05 23:30:53,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2176.7ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:30:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-06-05 23:30:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-06-05 23:30:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.5852596314907874) internal successors, (30868), 11940 states have internal predecessors, (30868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-06-05 23:30:53,434 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-06-05 23:30:53,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:53,434 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-06-05 23:30:53,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-06-05 23:30:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:30:53,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:53,441 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:53,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 23:30:53,642 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-06-05 23:30:53,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:53,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743408939] [2021-06-05 23:30:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:53,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743408939] [2021-06-05 23:30:53,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743408939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:53,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780973055] [2021-06-05 23:30:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:53,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:30:53,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:53,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:30:53,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:54,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:54,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:30:54,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:30:54,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:54,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:30:54,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:30:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:54,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780973055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:54,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:54,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 23:30:54,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12977120] [2021-06-05 23:30:54,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:30:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:30:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:30:54,347 INFO L87 Difference]: Start difference. First operand 11941 states and 30868 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:30:56,272 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-06-05 23:30:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:30:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:30:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:30:56,285 INFO L225 Difference]: With dead ends: 14838 [2021-06-05 23:30:56,285 INFO L226 Difference]: Without dead ends: 14775 [2021-06-05 23:30:56,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1762.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:30:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-06-05 23:30:56,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-06-05 23:30:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 2.5838265944143393) internal successors, (30993), 11995 states have internal predecessors, (30993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-06-05 23:30:56,423 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-06-05 23:30:56,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:30:56,423 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-06-05 23:30:56,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:30:56,423 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-06-05 23:30:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:30:56,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:30:56,431 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:30:56,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:56,632 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:30:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:30:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-06-05 23:30:56,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:30:56,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817568624] [2021-06-05 23:30:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:30:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:30:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:56,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:30:56,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817568624] [2021-06-05 23:30:56,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817568624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:56,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408806855] [2021-06-05 23:30:56,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:30:56,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:30:56,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:30:56,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:30:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:30:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:57,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:30:57,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:57,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:30:57,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:30:57,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-06-05 23:30:57,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:30:57,717 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-06-05 23:30:57,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:30:57,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-06-05 23:30:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:30:57,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408806855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:30:57,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:30:57,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-06-05 23:30:57,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864550577] [2021-06-05 23:30:57,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:30:57,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:30:57,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:30:57,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:30:57,776 INFO L87 Difference]: Start difference. First operand 11996 states and 30993 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:00,125 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-06-05 23:31:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:31:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:31:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:00,140 INFO L225 Difference]: With dead ends: 15015 [2021-06-05 23:31:00,140 INFO L226 Difference]: Without dead ends: 14957 [2021-06-05 23:31:00,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2191.7ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:31:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-06-05 23:31:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-06-05 23:31:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5794431132776996) internal successors, (31219), 12103 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-06-05 23:31:00,284 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-06-05 23:31:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:00,284 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-06-05 23:31:00,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-06-05 23:31:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:00,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:00,293 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:00,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 23:31:00,493 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:00,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-06-05 23:31:00,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:00,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751396595] [2021-06-05 23:31:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:00,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751396595] [2021-06-05 23:31:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751396595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715101431] [2021-06-05 23:31:00,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:00,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:00,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:01,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:01,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:01,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:01,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:01,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:01,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:01,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:01,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:01,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:01,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715101431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:01,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:01,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 23:31:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953363144] [2021-06-05 23:31:01,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:31:01,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:31:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:31:01,215 INFO L87 Difference]: Start difference. First operand 12104 states and 31219 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:03,416 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-06-05 23:31:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:31:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:31:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:03,432 INFO L225 Difference]: With dead ends: 15455 [2021-06-05 23:31:03,432 INFO L226 Difference]: Without dead ends: 15407 [2021-06-05 23:31:03,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2017.2ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:31:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-06-05 23:31:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-06-05 23:31:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12292 states, 12291 states have (on average 2.5755430803026607) internal successors, (31656), 12291 states have internal predecessors, (31656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:03,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-06-05 23:31:03,586 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-06-05 23:31:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:03,586 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-06-05 23:31:03,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-06-05 23:31:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:03,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:03,594 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:03,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:03,794 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-06-05 23:31:03,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:03,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94114666] [2021-06-05 23:31:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:04,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:04,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94114666] [2021-06-05 23:31:04,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94114666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:04,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480047326] [2021-06-05 23:31:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:04,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:31:04,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:04,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:04,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:04,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:04,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:04,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:04,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:04,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:04,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:04,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480047326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:04,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:04,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 23:31:04,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990757502] [2021-06-05 23:31:04,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:31:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:31:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:31:04,514 INFO L87 Difference]: Start difference. First operand 12292 states and 31656 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:06,964 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-06-05 23:31:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:31:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:31:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:06,981 INFO L225 Difference]: With dead ends: 16292 [2021-06-05 23:31:06,981 INFO L226 Difference]: Without dead ends: 16283 [2021-06-05 23:31:06,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2342.0ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:31:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-06-05 23:31:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-06-05 23:31:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 12440 states have (on average 2.5761254019292603) internal successors, (32047), 12440 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-06-05 23:31:07,177 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-06-05 23:31:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:07,177 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-06-05 23:31:07,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-06-05 23:31:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:07,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:07,186 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:07,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:07,386 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-06-05 23:31:07,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:07,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941357199] [2021-06-05 23:31:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:07,651 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:31:07,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:07,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941357199] [2021-06-05 23:31:07,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941357199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:07,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666726463] [2021-06-05 23:31:07,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:07,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:31:07,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:07,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:31:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:08,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:08,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:08,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-06-05 23:31:09,039 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-05 23:31:09,156 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-05 23:31:09,435 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-06-05 23:31:09,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 23:31:09,871 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-06-05 23:31:09,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:31:09,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-06-05 23:31:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:09,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666726463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:09,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:09,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-06-05 23:31:09,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779629443] [2021-06-05 23:31:09,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:31:09,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:31:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:31:09,922 INFO L87 Difference]: Start difference. First operand 12441 states and 32047 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-06-05 23:31:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:19,600 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-06-05 23:31:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:31:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:31:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:19,617 INFO L225 Difference]: With dead ends: 16489 [2021-06-05 23:31:19,618 INFO L226 Difference]: Without dead ends: 16467 [2021-06-05 23:31:19,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 4382.8ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:31:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-06-05 23:31:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-06-05 23:31:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.575421686746988) internal successors, (32064), 12450 states have internal predecessors, (32064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-06-05 23:31:19,777 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-06-05 23:31:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:19,777 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-06-05 23:31:19,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-06-05 23:31:19,778 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-06-05 23:31:19,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:19,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:19,786 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:19,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-05 23:31:19,988 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-06-05 23:31:19,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:19,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268732107] [2021-06-05 23:31:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:31:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268732107] [2021-06-05 23:31:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268732107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571518467] [2021-06-05 23:31:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:20,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:31:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:20,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:20,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:20,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:20,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:20,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:20,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:20,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:20,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:20,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571518467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:20,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:20,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:31:20,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892648598] [2021-06-05 23:31:20,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:31:20,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:31:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:31:20,624 INFO L87 Difference]: Start difference. First operand 12451 states and 32064 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 23:31:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:22,786 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-06-05 23:31:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:31:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-06-05 23:31:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:22,802 INFO L225 Difference]: With dead ends: 16411 [2021-06-05 23:31:22,802 INFO L226 Difference]: Without dead ends: 16378 [2021-06-05 23:31:22,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1914.3ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:31:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-06-05 23:31:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-06-05 23:31:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.572110792741165) internal successors, (32316), 12564 states have internal predecessors, (32316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-06-05 23:31:22,957 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-06-05 23:31:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:22,957 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-06-05 23:31:22,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 23:31:22,957 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-06-05 23:31:22,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:22,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:22,965 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:23,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:23,166 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:23,166 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-06-05 23:31:23,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:23,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604753575] [2021-06-05 23:31:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:31:23,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:23,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604753575] [2021-06-05 23:31:23,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604753575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:23,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90940557] [2021-06-05 23:31:23,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:23,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:31:23,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:23,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:23,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:23,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:23,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:23,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:23,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:23,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:23,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:23,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:23,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90940557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:23,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:23,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:31:23,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646195059] [2021-06-05 23:31:23,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:31:23,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:31:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:31:23,783 INFO L87 Difference]: Start difference. First operand 12565 states and 32316 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 23:31:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:26,818 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-06-05 23:31:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:31:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-06-05 23:31:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:26,835 INFO L225 Difference]: With dead ends: 16814 [2021-06-05 23:31:26,835 INFO L226 Difference]: Without dead ends: 16795 [2021-06-05 23:31:26,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2501.8ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:31:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-05 23:31:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-06-05 23:31:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12569 states, 12568 states have (on average 2.5725652450668366) internal successors, (32332), 12568 states have internal predecessors, (32332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-06-05 23:31:26,994 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-06-05 23:31:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:26,994 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-06-05 23:31:26,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 23:31:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-06-05 23:31:27,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:27,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:27,003 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:27,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:27,203 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-06-05 23:31:27,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:27,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193982746] [2021-06-05 23:31:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:31:27,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:27,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193982746] [2021-06-05 23:31:27,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193982746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:27,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857753385] [2021-06-05 23:31:27,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:27,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:31:27,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:27,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:31:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:28,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:28,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:28,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:28,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:28,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:28,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-06-05 23:31:28,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:31:28,310 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-06-05 23:31:28,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:31:28,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-06-05 23:31:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:28,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857753385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:28,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:28,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-05 23:31:28,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965703877] [2021-06-05 23:31:28,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:31:28,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:28,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:31:28,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:31:28,372 INFO L87 Difference]: Start difference. First operand 12569 states and 32332 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:30,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:30,772 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-06-05 23:31:30,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:31:30,772 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:31:30,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:30,787 INFO L225 Difference]: With dead ends: 15950 [2021-06-05 23:31:30,787 INFO L226 Difference]: Without dead ends: 15904 [2021-06-05 23:31:30,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2355.5ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:31:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-06-05 23:31:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-06-05 23:31:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12573 states, 12572 states have (on average 2.5706331530384983) internal successors, (32318), 12572 states have internal predecessors, (32318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-06-05 23:31:30,941 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-06-05 23:31:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:30,941 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-06-05 23:31:30,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:30,941 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-06-05 23:31:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:30,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:30,950 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:31,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 23:31:31,150 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-06-05 23:31:31,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:31,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152968962] [2021-06-05 23:31:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:31:31,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:31,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152968962] [2021-06-05 23:31:31,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152968962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:31,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136022316] [2021-06-05 23:31:31,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:31,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:31,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:31,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:31,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:31,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:31,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:31,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136022316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:31,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:31,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 23:31:31,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012010874] [2021-06-05 23:31:31,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:31:31,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:31:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:31:31,799 INFO L87 Difference]: Start difference. First operand 12573 states and 32318 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-06-05 23:31:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:33,951 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-06-05 23:31:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:31:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:31:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:33,965 INFO L225 Difference]: With dead ends: 13633 [2021-06-05 23:31:33,965 INFO L226 Difference]: Without dead ends: 13606 [2021-06-05 23:31:33,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1979.1ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:31:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-06-05 23:31:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-06-05 23:31:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 2.5693430656934306) internal successors, (32384), 12604 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-06-05 23:31:34,112 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-06-05 23:31:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:34,112 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-06-05 23:31:34,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-06-05 23:31:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-06-05 23:31:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:34,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:34,121 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:34,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:34,325 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-06-05 23:31:34,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:34,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778861333] [2021-06-05 23:31:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:31:34,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778861333] [2021-06-05 23:31:34,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778861333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907123881] [2021-06-05 23:31:34,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:34,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:31:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:34,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:34,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:34,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:34,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:35,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:35,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:35,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:35,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907123881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:35,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:35,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 23:31:35,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671601848] [2021-06-05 23:31:35,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:31:35,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:31:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:31:35,019 INFO L87 Difference]: Start difference. First operand 12605 states and 32384 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-06-05 23:31:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:37,039 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-06-05 23:31:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:31:37,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-06-05 23:31:37,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:37,055 INFO L225 Difference]: With dead ends: 16746 [2021-06-05 23:31:37,056 INFO L226 Difference]: Without dead ends: 16713 [2021-06-05 23:31:37,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1987.6ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:31:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-06-05 23:31:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-06-05 23:31:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5682610072853977) internal successors, (32432), 12628 states have internal predecessors, (32432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-06-05 23:31:37,215 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-06-05 23:31:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:37,216 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-06-05 23:31:37,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-06-05 23:31:37,216 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-06-05 23:31:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:37,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:37,224 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:37,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 23:31:37,426 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:37,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-06-05 23:31:37,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:37,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718589721] [2021-06-05 23:31:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:31:37,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718589721] [2021-06-05 23:31:37,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718589721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:37,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932265031] [2021-06-05 23:31:37,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:37,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:31:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:37,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:31:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:38,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:38,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:38,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:38,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 97 treesize of output 247 [2021-06-05 23:31:39,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:31:39,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:39,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:39,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-06-05 23:31:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:39,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932265031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:39,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:39,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-05 23:31:39,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77935632] [2021-06-05 23:31:39,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:31:39,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:31:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:31:39,205 INFO L87 Difference]: Start difference. First operand 12629 states and 32432 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-06-05 23:31:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:43,744 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-06-05 23:31:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:31:43,744 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 34 [2021-06-05 23:31:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:43,761 INFO L225 Difference]: With dead ends: 16941 [2021-06-05 23:31:43,761 INFO L226 Difference]: Without dead ends: 16910 [2021-06-05 23:31:43,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 3977.8ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 23:31:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-06-05 23:31:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-06-05 23:31:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5688945201140325) internal successors, (32440), 12628 states have internal predecessors, (32440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-06-05 23:31:43,922 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-06-05 23:31:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:43,922 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-06-05 23:31:43,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-06-05 23:31:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-06-05 23:31:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:43,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:43,931 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:44,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 23:31:44,133 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:44,133 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-06-05 23:31:44,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:44,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636531643] [2021-06-05 23:31:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:31:44,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:44,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636531643] [2021-06-05 23:31:44,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636531643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:44,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12191524] [2021-06-05 23:31:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:44,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:31:44,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:44,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:44,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:44,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:44,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:44,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:44,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:44,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:44,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:44,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:44,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12191524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:44,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:44,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 23:31:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997716116] [2021-06-05 23:31:44,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:31:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:31:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:31:44,819 INFO L87 Difference]: Start difference. First operand 12629 states and 32440 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 23:31:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:47,094 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-06-05 23:31:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 23:31:47,094 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-06-05 23:31:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:47,107 INFO L225 Difference]: With dead ends: 13890 [2021-06-05 23:31:47,107 INFO L226 Difference]: Without dead ends: 13872 [2021-06-05 23:31:47,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2141.9ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:31:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-06-05 23:31:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-06-05 23:31:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 2.568857527947356) internal successors, (32401), 12613 states have internal predecessors, (32401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-06-05 23:31:47,258 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-06-05 23:31:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:47,258 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-06-05 23:31:47,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 23:31:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-06-05 23:31:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:47,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:47,267 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:47,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 23:31:47,468 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:47,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-06-05 23:31:47,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:47,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622786231] [2021-06-05 23:31:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:47,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622786231] [2021-06-05 23:31:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622786231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480247831] [2021-06-05 23:31:47,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:47,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:31:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:47,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:31:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:48,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:48,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:48,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:48,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:48,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-06-05 23:31:48,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:31:48,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:48,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:31:48,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 23:31:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:48,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480247831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:48,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:48,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 23:31:48,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364798633] [2021-06-05 23:31:48,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:31:48,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:31:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:31:48,107 INFO L87 Difference]: Start difference. First operand 12614 states and 32401 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-06-05 23:31:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:49,338 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-06-05 23:31:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:31:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-06-05 23:31:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:49,351 INFO L225 Difference]: With dead ends: 13122 [2021-06-05 23:31:49,351 INFO L226 Difference]: Without dead ends: 13095 [2021-06-05 23:31:49,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1100.0ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:31:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-06-05 23:31:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-06-05 23:31:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 2.565472415979708) internal successors, (32366), 12616 states have internal predecessors, (32366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-06-05 23:31:49,516 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-06-05 23:31:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:49,516 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-06-05 23:31:49,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-06-05 23:31:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-06-05 23:31:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:31:49,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:49,525 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:49,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable942,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:49,725 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-06-05 23:31:49,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:49,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782518442] [2021-06-05 23:31:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:49,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:49,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782518442] [2021-06-05 23:31:49,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782518442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:49,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835518758] [2021-06-05 23:31:49,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:49,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:31:49,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:49,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:31:49,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:31:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:50,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:31:50,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:31:50,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:31:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-06-05 23:31:52,196 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-06-05 23:31:52,664 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-05 23:31:53,128 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-05 23:31:53,635 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-06-05 23:31:54,108 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-06-05 23:31:54,744 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 223 [2021-06-05 23:31:55,313 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-06-05 23:31:55,817 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-06-05 23:31:56,701 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-06-05 23:31:57,392 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-06-05 23:31:57,849 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-06-05 23:31:58,021 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-06-05 23:31:58,381 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-06-05 23:31:59,898 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-05 23:32:01,325 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-05 23:32:02,845 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-06-05 23:32:04,811 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-06-05 23:32:06,213 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-06-05 23:32:08,026 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 440 DAG size of output: 331 [2021-06-05 23:32:50,094 WARN L205 SmtUtils]: Spent 41.96 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-06-05 23:33:07,541 WARN L205 SmtUtils]: Spent 17.44 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1621 [2021-06-05 23:37:32,604 WARN L205 SmtUtils]: Spent 4.42 m on a formula simplification. DAG size of input: 2109 DAG size of output: 1628 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown