/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:01:25,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:01:25,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:01:25,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:01:25,983 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 [2021-06-12 21:01:25,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:01:25,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:01:25,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:01:25,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:01:25,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:01:25,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:01:25,998 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:01:25,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:01:25,998 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:01:25,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:01:25,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:01:25,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:01:26,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:01:26,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:01:26,000 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:01:26,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:01:26,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:01:26,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:01:26,234 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:01:26,236 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:01:26,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-06-12 21:01:26,237 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-06-12 21:01:26,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:01:26,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:01:26,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:01:26,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:01:26,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:01:26,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:01:26,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:01:26,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:01:26,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:01:26,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/1) ... [2021-06-12 21:01:26,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:01:26,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:01:26,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:01:26,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:01:26,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (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 [2021-06-12 21:01:26,351 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:01:26,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:01:26,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:01:26,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:01:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:01:26,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:01:26,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:01:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:01:26,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:01:26,353 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:01:26,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:01:26,472 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:01:26,473 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:01:26 BoogieIcfgContainer [2021-06-12 21:01:26,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:01:26,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:01:26,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:01:26,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:01:26,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:01:26" (1/2) ... [2021-06-12 21:01:26,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c12516 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:01:26, skipping insertion in model container [2021-06-12 21:01:26,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:01:26" (2/2) ... [2021-06-12 21:01:26,479 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-06-12 21:01:26,482 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:01:26,482 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:01:26,483 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:01:26,483 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:01:26,502 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 21:01:26,516 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 21:01:26,529 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:01:26,529 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:01:26,529 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:01:26,529 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:01:26,529 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:01:26,529 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:01:26,529 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:01:26,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:01:26,535 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-12 21:01:26,559 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-06-12 21:01:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-06-12 21:01:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:01:26,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:26,564 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:26,565 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-06-12 21:01:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:26,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148683404] [2021-06-12 21:01:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:26,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:26,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148683404] [2021-06-12 21:01:26,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148683404] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:01:26,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:01:26,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:01:26,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237766963] [2021-06-12 21:01:26,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:01:26,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:01:26,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:01:26,694 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:26,750 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-12 21:01:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:01:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 21:01:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:26,760 INFO L225 Difference]: With dead ends: 43 [2021-06-12 21:01:26,760 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 21:01:26,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:01:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 21:01:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-12 21:01:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-12 21:01:26,793 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-12 21:01:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:26,793 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-12 21:01:26,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-12 21:01:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:01:26,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:26,795 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:26,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:01:26,795 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:26,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-06-12 21:01:26,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:26,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542090055] [2021-06-12 21:01:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:01:26,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:26,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542090055] [2021-06-12 21:01:26,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542090055] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:01:26,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:01:26,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:01:26,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844102404] [2021-06-12 21:01:26,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:01:26,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:01:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:01:26,877 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:26,908 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-12 21:01:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:01:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 21:01:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:26,912 INFO L225 Difference]: With dead ends: 50 [2021-06-12 21:01:26,912 INFO L226 Difference]: Without dead ends: 50 [2021-06-12 21:01:26,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:01:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-12 21:01:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-12 21:01:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 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) [2021-06-12 21:01:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-12 21:01:26,925 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-12 21:01:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:26,925 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-12 21:01:26,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-12 21:01:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:01:26,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:26,926 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:26,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:01:26,926 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:26,927 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-06-12 21:01:26,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:26,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56423969] [2021-06-12 21:01:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:27,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56423969] [2021-06-12 21:01:27,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56423969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772496931] [2021-06-12 21:01:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:01:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:27,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772496931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:27,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:27,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-12 21:01:27,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552021139] [2021-06-12 21:01:27,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:01:27,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:27,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:01:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:01:27,203 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-06-12 21:01:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:27,231 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-06-12 21:01:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:01:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 19 [2021-06-12 21:01:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:27,232 INFO L225 Difference]: With dead ends: 99 [2021-06-12 21:01:27,233 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 21:01:27,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:01:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 21:01:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-06-12 21:01:27,236 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) [2021-06-12 21:01:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-12 21:01:27,237 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-06-12 21:01:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:27,237 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-12 21:01:27,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-06-12 21:01:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-12 21:01:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:01:27,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:27,238 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:27,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 21:01:27,446 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:27,447 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-06-12 21:01:27,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:27,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769065542] [2021-06-12 21:01:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:27,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:27,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769065542] [2021-06-12 21:01:27,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769065542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:27,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003127748] [2021-06-12 21:01:27,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:27,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:01:27,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:27,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:01:27,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:27,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003127748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:27,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:27,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:01:27,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920399342] [2021-06-12 21:01:27,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:01:27,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:27,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:01:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:01:27,637 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-06-12 21:01:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:27,657 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-06-12 21:01:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:01:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 19 [2021-06-12 21:01:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:27,658 INFO L225 Difference]: With dead ends: 80 [2021-06-12 21:01:27,658 INFO L226 Difference]: Without dead ends: 77 [2021-06-12 21:01:27,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:01:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-12 21:01:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-06-12 21:01:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-12 21:01:27,662 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-06-12 21:01:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:27,662 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-12 21:01:27,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-06-12 21:01:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-12 21:01:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:01:27,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:27,663 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:27,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:27,873 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-06-12 21:01:27,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:27,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175922694] [2021-06-12 21:01:27,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:27,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:27,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175922694] [2021-06-12 21:01:27,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175922694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790465144] [2021-06-12 21:01:27,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:27,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:01:27,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:01:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:28,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790465144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:28,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:28,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:01:28,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345206544] [2021-06-12 21:01:28,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:01:28,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:01:28,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:01:28,139 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:28,431 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-06-12 21:01:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:01:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 21:01:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:28,438 INFO L225 Difference]: With dead ends: 198 [2021-06-12 21:01:28,438 INFO L226 Difference]: Without dead ends: 192 [2021-06-12 21:01:28,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:01:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-12 21:01:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-06-12 21:01:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-06-12 21:01:28,449 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-06-12 21:01:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:28,449 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-06-12 21:01:28,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-06-12 21:01:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:01:28,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:28,450 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:28,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:28,675 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-06-12 21:01:28,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:28,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047007999] [2021-06-12 21:01:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:28,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:28,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047007999] [2021-06-12 21:01:28,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047007999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:28,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790406950] [2021-06-12 21:01:28,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:28,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:01:28,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:01:28,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790406950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:28,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:28,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-12 21:01:28,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802969688] [2021-06-12 21:01:28,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:01:28,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:28,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:01:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:01:28,884 INFO L87 Difference]: Start difference. First operand 90 states and 181 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) [2021-06-12 21:01:29,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:29,177 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-06-12 21:01:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:01:29,178 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 21 [2021-06-12 21:01:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:29,178 INFO L225 Difference]: With dead ends: 170 [2021-06-12 21:01:29,178 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 21:01:29,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:01:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 21:01:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-06-12 21:01:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-06-12 21:01:29,184 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-06-12 21:01:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:29,184 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-06-12 21:01:29,184 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) [2021-06-12 21:01:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-06-12 21:01:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:01:29,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:29,185 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:29,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:29,401 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-06-12 21:01:29,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:29,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035091253] [2021-06-12 21:01:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:29,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:29,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035091253] [2021-06-12 21:01:29,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035091253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:29,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446811296] [2021-06-12 21:01:29,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:29,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:01:29,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:01:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:29,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446811296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:29,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:29,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 21:01:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220737609] [2021-06-12 21:01:29,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:01:29,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:01:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:01:29,574 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:29,602 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-06-12 21:01:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:01:29,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:01:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:29,603 INFO L225 Difference]: With dead ends: 190 [2021-06-12 21:01:29,603 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 21:01:29,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:01:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 21:01:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-06-12 21:01:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-06-12 21:01:29,622 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-06-12 21:01:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:29,622 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-06-12 21:01:29,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-06-12 21:01:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:01:29,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:29,626 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:29,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:29,826 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-06-12 21:01:29,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:29,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750020656] [2021-06-12 21:01:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:29,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750020656] [2021-06-12 21:01:29,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750020656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830438259] [2021-06-12 21:01:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:29,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:01:29,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:01:29,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:30,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830438259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:30,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:30,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 21:01:30,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131097907] [2021-06-12 21:01:30,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:01:30,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:01:30,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:01:30,083 INFO L87 Difference]: Start difference. First operand 120 states and 248 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) [2021-06-12 21:01:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:30,520 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-06-12 21:01:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 21:01:30,521 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 23 [2021-06-12 21:01:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:30,522 INFO L225 Difference]: With dead ends: 320 [2021-06-12 21:01:30,522 INFO L226 Difference]: Without dead ends: 302 [2021-06-12 21:01:30,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:01:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-12 21:01:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-06-12 21:01:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-06-12 21:01:30,528 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-06-12 21:01:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:30,528 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-06-12 21:01:30,528 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) [2021-06-12 21:01:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-06-12 21:01:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:01:30,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:30,529 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:30,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:30,748 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-06-12 21:01:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:30,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415420660] [2021-06-12 21:01:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:30,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:30,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415420660] [2021-06-12 21:01:30,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415420660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:30,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174004484] [2021-06-12 21:01:30,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:30,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:01:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:30,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174004484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:30,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:30,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:01:30,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075723062] [2021-06-12 21:01:30,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:01:30,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:01:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:01:30,983 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:31,302 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-06-12 21:01:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:01:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:01:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:31,304 INFO L225 Difference]: With dead ends: 321 [2021-06-12 21:01:31,304 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 21:01:31,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:01:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 21:01:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-06-12 21:01:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-06-12 21:01:31,310 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-06-12 21:01:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:31,310 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-06-12 21:01:31,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-06-12 21:01:31,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:01:31,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:31,311 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:31,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 21:01:31,528 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:31,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-06-12 21:01:31,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:31,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354173781] [2021-06-12 21:01:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:31,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354173781] [2021-06-12 21:01:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354173781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:31,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517504674] [2021-06-12 21:01:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:31,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:01:31,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:01:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:31,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517504674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:31,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:31,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:01:31,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903198290] [2021-06-12 21:01:31,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:01:31,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:01:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:01:31,816 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-06-12 21:01:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:32,314 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-06-12 21:01:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:01:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 25 [2021-06-12 21:01:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:32,316 INFO L225 Difference]: With dead ends: 435 [2021-06-12 21:01:32,316 INFO L226 Difference]: Without dead ends: 417 [2021-06-12 21:01:32,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:01:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-12 21:01:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-06-12 21:01:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-06-12 21:01:32,322 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-06-12 21:01:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:32,322 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-06-12 21:01:32,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2021-06-12 21:01:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-06-12 21:01:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:01:32,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:32,323 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:32,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 21:01:32,545 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:32,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-06-12 21:01:32,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:32,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472020551] [2021-06-12 21:01:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:32,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:32,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472020551] [2021-06-12 21:01:32,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472020551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:32,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648017533] [2021-06-12 21:01:32,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:32,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:01:32,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:01:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:32,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648017533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:32,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:32,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-12 21:01:32,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641840709] [2021-06-12 21:01:32,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:01:32,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:01:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:01:32,789 INFO L87 Difference]: Start difference. First operand 186 states and 399 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) [2021-06-12 21:01:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:33,217 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-06-12 21:01:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:01:33,217 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 25 [2021-06-12 21:01:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:33,219 INFO L225 Difference]: With dead ends: 340 [2021-06-12 21:01:33,219 INFO L226 Difference]: Without dead ends: 336 [2021-06-12 21:01:33,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:01:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-12 21:01:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-06-12 21:01:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-06-12 21:01:33,227 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-06-12 21:01:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:33,227 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-06-12 21:01:33,227 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) [2021-06-12 21:01:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-06-12 21:01:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:01:33,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:33,229 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:33,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:33,433 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:33,433 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-06-12 21:01:33,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:33,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651839817] [2021-06-12 21:01:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:33,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651839817] [2021-06-12 21:01:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651839817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768380983] [2021-06-12 21:01:33,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:33,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:01:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:01:33,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768380983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:33,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:33,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 21:01:33,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984962848] [2021-06-12 21:01:33,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:01:33,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:33,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:01:33,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:01:33,570 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-06-12 21:01:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:33,598 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-06-12 21:01:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:01:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 27 [2021-06-12 21:01:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:33,602 INFO L225 Difference]: With dead ends: 354 [2021-06-12 21:01:33,602 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 21:01:33,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:01:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 21:01:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-06-12 21:01:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-06-12 21:01:33,609 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-06-12 21:01:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:33,609 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-06-12 21:01:33,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-06-12 21:01:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-06-12 21:01:33,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:01:33,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:33,610 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:33,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:33,825 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-06-12 21:01:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:33,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710612463] [2021-06-12 21:01:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:33,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:33,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710612463] [2021-06-12 21:01:33,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710612463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:33,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393803599] [2021-06-12 21:01:33,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:33,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:01:33,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:33,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:01:33,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393803599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:34,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:34,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 21:01:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680224561] [2021-06-12 21:01:34,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:01:34,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:01:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:01:34,164 INFO L87 Difference]: Start difference. First operand 242 states and 531 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) [2021-06-12 21:01:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:34,920 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-06-12 21:01:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:01:34,921 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 27 [2021-06-12 21:01:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:34,922 INFO L225 Difference]: With dead ends: 559 [2021-06-12 21:01:34,922 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 21:01:34,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:01:34,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 21:01:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-06-12 21:01:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-06-12 21:01:34,931 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-06-12 21:01:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:34,931 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-06-12 21:01:34,931 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) [2021-06-12 21:01:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-06-12 21:01:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:01:34,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:34,932 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:35,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 21:01:35,145 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-06-12 21:01:35,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:35,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057067311] [2021-06-12 21:01:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057067311] [2021-06-12 21:01:35,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057067311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:35,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969018241] [2021-06-12 21:01:35,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:35,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:01:35,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:35,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:01:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969018241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 21:01:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186658608] [2021-06-12 21:01:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:01:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:01:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:01:35,466 INFO L87 Difference]: Start difference. First operand 234 states and 514 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) [2021-06-12 21:01:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:36,174 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-06-12 21:01:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:01:36,174 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 27 [2021-06-12 21:01:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:36,177 INFO L225 Difference]: With dead ends: 976 [2021-06-12 21:01:36,177 INFO L226 Difference]: Without dead ends: 940 [2021-06-12 21:01:36,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:01:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-12 21:01:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-06-12 21:01:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-06-12 21:01:36,185 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-06-12 21:01:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:36,185 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-06-12 21:01:36,185 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) [2021-06-12 21:01:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-06-12 21:01:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:01:36,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:36,186 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:36,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 21:01:36,401 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:36,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-06-12 21:01:36,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:36,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152716800] [2021-06-12 21:01:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:36,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:36,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152716800] [2021-06-12 21:01:36,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152716800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:36,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189141310] [2021-06-12 21:01:36,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:01:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:36,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189141310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:36,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:36,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 21:01:36,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945516415] [2021-06-12 21:01:36,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:01:36,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:36,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:01:36,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:01:36,709 INFO L87 Difference]: Start difference. First operand 311 states and 691 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) [2021-06-12 21:01:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:37,483 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-06-12 21:01:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:01:37,484 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 27 [2021-06-12 21:01:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:37,486 INFO L225 Difference]: With dead ends: 802 [2021-06-12 21:01:37,486 INFO L226 Difference]: Without dead ends: 794 [2021-06-12 21:01:37,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:01:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-06-12 21:01:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-06-12 21:01:37,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:37,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-06-12 21:01:37,494 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-06-12 21:01:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:37,494 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-06-12 21:01:37,494 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) [2021-06-12 21:01:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-06-12 21:01:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:01:37,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:37,495 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:37,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 21:01:37,695 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-06-12 21:01:37,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:37,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957428726] [2021-06-12 21:01:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:37,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:37,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957428726] [2021-06-12 21:01:37,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957428726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:37,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511647886] [2021-06-12 21:01:37,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:01:37,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:01:37,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:38,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511647886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:38,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:38,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:01:38,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231639165] [2021-06-12 21:01:38,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:01:38,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:38,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:01:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:01:38,034 INFO L87 Difference]: Start difference. First operand 259 states and 563 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) [2021-06-12 21:01:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:38,832 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-06-12 21:01:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:01:38,832 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 29 [2021-06-12 21:01:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:38,834 INFO L225 Difference]: With dead ends: 680 [2021-06-12 21:01:38,834 INFO L226 Difference]: Without dead ends: 638 [2021-06-12 21:01:38,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:01:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-12 21:01:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-06-12 21:01:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-06-12 21:01:38,840 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-06-12 21:01:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:38,840 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-06-12 21:01:38,841 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) [2021-06-12 21:01:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-06-12 21:01:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:01:38,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:38,841 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:39,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:39,057 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:39,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-06-12 21:01:39,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:39,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319997380] [2021-06-12 21:01:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:39,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:39,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319997380] [2021-06-12 21:01:39,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319997380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:39,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828044943] [2021-06-12 21:01:39,107 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 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 [2021-06-12 21:01:39,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:01:39,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:01:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:39,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828044943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:39,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:39,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-12 21:01:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398657729] [2021-06-12 21:01:39,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:01:39,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:01:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:01:39,366 INFO L87 Difference]: Start difference. First operand 270 states and 582 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) [2021-06-12 21:01:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:40,375 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-06-12 21:01:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:01:40,375 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 29 [2021-06-12 21:01:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:40,382 INFO L225 Difference]: With dead ends: 520 [2021-06-12 21:01:40,382 INFO L226 Difference]: Without dead ends: 516 [2021-06-12 21:01:40,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 833.2ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:01:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-12 21:01:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-06-12 21:01:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-06-12 21:01:40,397 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-06-12 21:01:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:40,397 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-06-12 21:01:40,397 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) [2021-06-12 21:01:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-06-12 21:01:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:01:40,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:40,397 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:40,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:40,628 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-06-12 21:01:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004303279] [2021-06-12 21:01:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:40,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004303279] [2021-06-12 21:01:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004303279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193529433] [2021-06-12 21:01:40,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:01:40,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:01:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:01:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:40,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193529433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:40,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:40,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 21:01:40,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118053482] [2021-06-12 21:01:40,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 21:01:40,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 21:01:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:01:40,868 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-06-12 21:01:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:40,909 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-06-12 21:01:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:01:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 31 [2021-06-12 21:01:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:40,910 INFO L225 Difference]: With dead ends: 492 [2021-06-12 21:01:40,910 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 21:01:40,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:01:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 21:01:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-06-12 21:01:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-06-12 21:01:40,916 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-06-12 21:01:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:40,916 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-06-12 21:01:40,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-06-12 21:01:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-06-12 21:01:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:01:40,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:40,916 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:41,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:41,133 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-06-12 21:01:41,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:41,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305033241] [2021-06-12 21:01:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:41,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:41,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305033241] [2021-06-12 21:01:41,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305033241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:41,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482848226] [2021-06-12 21:01:41,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:41,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:01:41,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:01:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:41,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482848226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:41,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:41,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-12 21:01:41,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111930339] [2021-06-12 21:01:41,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:01:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:41,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:01:41,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:01:41,542 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-06-12 21:01:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:42,574 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-06-12 21:01:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:01:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 31 [2021-06-12 21:01:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:42,577 INFO L225 Difference]: With dead ends: 772 [2021-06-12 21:01:42,577 INFO L226 Difference]: Without dead ends: 766 [2021-06-12 21:01:42,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:01:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-12 21:01:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-06-12 21:01:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-06-12 21:01:42,583 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-06-12 21:01:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:42,583 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-06-12 21:01:42,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-06-12 21:01:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-06-12 21:01:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:01:42,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:42,584 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:42,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 21:01:42,793 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-06-12 21:01:42,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:42,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417324411] [2021-06-12 21:01:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:42,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:42,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417324411] [2021-06-12 21:01:42,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417324411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:42,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759469131] [2021-06-12 21:01:42,895 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 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 [2021-06-12 21:01:42,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:01:42,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:42,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:01:42,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:43,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759469131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:43,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:43,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:01:43,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231109880] [2021-06-12 21:01:43,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:01:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:01:43,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:01:43,183 INFO L87 Difference]: Start difference. First operand 328 states and 723 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) [2021-06-12 21:01:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:44,283 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-06-12 21:01:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:01:44,283 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 31 [2021-06-12 21:01:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:44,286 INFO L225 Difference]: With dead ends: 1342 [2021-06-12 21:01:44,286 INFO L226 Difference]: Without dead ends: 1318 [2021-06-12 21:01:44,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 928.7ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:01:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-12 21:01:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-06-12 21:01:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-06-12 21:01:44,300 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-06-12 21:01:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:44,300 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-06-12 21:01:44,300 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) [2021-06-12 21:01:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-06-12 21:01:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:01:44,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:44,301 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:44,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:01:44,517 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-06-12 21:01:44,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:44,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276256581] [2021-06-12 21:01:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:44,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276256581] [2021-06-12 21:01:44,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276256581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:44,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96162870] [2021-06-12 21:01:44,605 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 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 [2021-06-12 21:01:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:01:44,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:44,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96162870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:44,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:44,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-12 21:01:44,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166619549] [2021-06-12 21:01:44,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:01:44,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:01:44,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:01:44,882 INFO L87 Difference]: Start difference. First operand 404 states and 908 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) [2021-06-12 21:01:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:45,892 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-06-12 21:01:45,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:01:45,892 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 31 [2021-06-12 21:01:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:45,895 INFO L225 Difference]: With dead ends: 1094 [2021-06-12 21:01:45,895 INFO L226 Difference]: Without dead ends: 1090 [2021-06-12 21:01:45,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:01:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-12 21:01:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-06-12 21:01:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-06-12 21:01:45,908 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-06-12 21:01:45,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:45,908 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-06-12 21:01:45,908 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) [2021-06-12 21:01:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-06-12 21:01:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:01:45,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:45,910 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:46,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 21:01:46,126 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:46,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-06-12 21:01:46,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:46,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908631928] [2021-06-12 21:01:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:46,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908631928] [2021-06-12 21:01:46,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908631928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587736236] [2021-06-12 21:01:46,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:46,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:01:46,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:01:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:46,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587736236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:46,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:46,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-12 21:01:46,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482986642] [2021-06-12 21:01:46,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:01:46,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:46,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:01:46,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:01:46,453 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-06-12 21:01:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:47,284 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-06-12 21:01:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:01:47,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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 31 [2021-06-12 21:01:47,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:47,288 INFO L225 Difference]: With dead ends: 1727 [2021-06-12 21:01:47,288 INFO L226 Difference]: Without dead ends: 1631 [2021-06-12 21:01:47,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:01:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-12 21:01:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-06-12 21:01:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-06-12 21:01:47,297 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-06-12 21:01:47,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:47,297 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-06-12 21:01:47,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-06-12 21:01:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-06-12 21:01:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 21:01:47,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:47,298 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:47,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 21:01:47,517 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-06-12 21:01:47,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:47,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115008904] [2021-06-12 21:01:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:47,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:47,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115008904] [2021-06-12 21:01:47,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115008904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:47,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031125640] [2021-06-12 21:01:47,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:47,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:01:47,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:01:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031125640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:47,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:47,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-12 21:01:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742858946] [2021-06-12 21:01:47,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:01:47,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:47,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:01:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:01:47,853 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:48,928 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-06-12 21:01:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:01:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 21:01:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:48,931 INFO L225 Difference]: With dead ends: 1314 [2021-06-12 21:01:48,931 INFO L226 Difference]: Without dead ends: 1310 [2021-06-12 21:01:48,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 988.0ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:01:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-12 21:01:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-06-12 21:01:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-06-12 21:01:48,942 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-06-12 21:01:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:48,942 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-06-12 21:01:48,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-06-12 21:01:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 21:01:48,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:48,943 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:49,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:49,157 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-06-12 21:01:49,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:49,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841997302] [2021-06-12 21:01:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:49,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841997302] [2021-06-12 21:01:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841997302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588505799] [2021-06-12 21:01:49,251 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 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 [2021-06-12 21:01:49,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:01:49,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:49,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:01:49,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:49,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588505799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:49,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:49,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:01:49,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392256994] [2021-06-12 21:01:49,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:01:49,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:01:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:01:49,528 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:50,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:50,557 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-06-12 21:01:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:01:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 21:01:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:50,560 INFO L225 Difference]: With dead ends: 1171 [2021-06-12 21:01:50,560 INFO L226 Difference]: Without dead ends: 1099 [2021-06-12 21:01:50,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 956.8ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 21:01:50,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-12 21:01:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-06-12 21:01:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-06-12 21:01:50,569 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-06-12 21:01:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:50,569 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-06-12 21:01:50,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:50,569 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-06-12 21:01:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 21:01:50,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:50,570 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:50,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:50,782 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:50,782 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-06-12 21:01:50,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:50,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227493794] [2021-06-12 21:01:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:50,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:50,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227493794] [2021-06-12 21:01:50,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227493794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:50,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229780973] [2021-06-12 21:01:50,877 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 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 [2021-06-12 21:01:50,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:01:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:01:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:51,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229780973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:51,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:51,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-12 21:01:51,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480650889] [2021-06-12 21:01:51,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:01:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:01:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:01:51,182 INFO L87 Difference]: Start difference. First operand 572 states and 1314 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) [2021-06-12 21:01:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:52,177 INFO L93 Difference]: Finished difference Result 940 states and 2022 transitions. [2021-06-12 21:01:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:01:52,177 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 33 [2021-06-12 21:01:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:52,180 INFO L225 Difference]: With dead ends: 940 [2021-06-12 21:01:52,180 INFO L226 Difference]: Without dead ends: 936 [2021-06-12 21:01:52,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=1104, Invalid=3452, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:01:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-06-12 21:01:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 572. [2021-06-12 21:01:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-06-12 21:01:52,188 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-06-12 21:01:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:52,188 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-06-12 21:01:52,188 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) [2021-06-12 21:01:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-06-12 21:01:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:01:52,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:52,189 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:52,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 21:01:52,404 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:52,404 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-06-12 21:01:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868212095] [2021-06-12 21:01:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:52,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:52,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868212095] [2021-06-12 21:01:52,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868212095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:52,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133918900] [2021-06-12 21:01:52,466 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 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 [2021-06-12 21:01:52,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:01:52,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:01:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133918900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:52,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:52,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 12 [2021-06-12 21:01:52,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544744515] [2021-06-12 21:01:52,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:01:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:01:52,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:01:52,612 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:52,756 INFO L93 Difference]: Finished difference Result 950 states and 2099 transitions. [2021-06-12 21:01:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:01:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 21:01:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:52,759 INFO L225 Difference]: With dead ends: 950 [2021-06-12 21:01:52,759 INFO L226 Difference]: Without dead ends: 896 [2021-06-12 21:01:52,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:01:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-12 21:01:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 724. [2021-06-12 21:01:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.336099585062241) internal successors, (1689), 723 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1689 transitions. [2021-06-12 21:01:52,768 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1689 transitions. Word has length 35 [2021-06-12 21:01:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:52,768 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1689 transitions. [2021-06-12 21:01:52,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1689 transitions. [2021-06-12 21:01:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:01:52,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:52,769 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:52,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:52,977 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 25 times [2021-06-12 21:01:52,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:52,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198239787] [2021-06-12 21:01:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:53,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198239787] [2021-06-12 21:01:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198239787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260237025] [2021-06-12 21:01:53,082 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 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 [2021-06-12 21:01:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:01:53,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:53,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260237025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:53,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:53,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:01:53,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026184833] [2021-06-12 21:01:53,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:01:53,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:01:53,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:01:53,392 INFO L87 Difference]: Start difference. First operand 724 states and 1689 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:54,983 INFO L93 Difference]: Finished difference Result 2174 states and 4585 transitions. [2021-06-12 21:01:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:01:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 21:01:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:54,988 INFO L225 Difference]: With dead ends: 2174 [2021-06-12 21:01:54,988 INFO L226 Difference]: Without dead ends: 2150 [2021-06-12 21:01:54,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1246.3ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 21:01:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-12 21:01:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 800. [2021-06-12 21:01:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3617021276595747) internal successors, (1887), 799 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1887 transitions. [2021-06-12 21:01:55,002 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1887 transitions. Word has length 35 [2021-06-12 21:01:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:55,002 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1887 transitions. [2021-06-12 21:01:55,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1887 transitions. [2021-06-12 21:01:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:01:55,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:55,004 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:55,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 21:01:55,220 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 26 times [2021-06-12 21:01:55,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:55,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560244870] [2021-06-12 21:01:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:55,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:55,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560244870] [2021-06-12 21:01:55,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560244870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:55,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255813505] [2021-06-12 21:01:55,307 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 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 [2021-06-12 21:01:55,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:01:55,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:55,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:01:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:55,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255813505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:55,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:55,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-12 21:01:55,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569329224] [2021-06-12 21:01:55,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:01:55,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:55,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:01:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:01:55,643 INFO L87 Difference]: Start difference. First operand 800 states and 1887 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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) [2021-06-12 21:01:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:57,105 INFO L93 Difference]: Finished difference Result 1787 states and 3872 transitions. [2021-06-12 21:01:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:01:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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 35 [2021-06-12 21:01:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:57,109 INFO L225 Difference]: With dead ends: 1787 [2021-06-12 21:01:57,109 INFO L226 Difference]: Without dead ends: 1783 [2021-06-12 21:01:57,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1493 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=761, Invalid=4495, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:01:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-06-12 21:01:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 712. [2021-06-12 21:01:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-06-12 21:01:57,120 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-06-12 21:01:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-06-12 21:01:57,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 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) [2021-06-12 21:01:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-06-12 21:01:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:01:57,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:57,121 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:01:57,341 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 27 times [2021-06-12 21:01:57,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:57,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809269349] [2021-06-12 21:01:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:57,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809269349] [2021-06-12 21:01:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809269349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:57,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239876027] [2021-06-12 21:01:57,451 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 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 [2021-06-12 21:01:57,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:01:57,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:01:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:57,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239876027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:57,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:57,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:01:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518035056] [2021-06-12 21:01:57,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:01:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:01:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:01:57,738 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:01:59,217 INFO L93 Difference]: Finished difference Result 2749 states and 5737 transitions. [2021-06-12 21:01:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 21:01:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 21:01:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:01:59,224 INFO L225 Difference]: With dead ends: 2749 [2021-06-12 21:01:59,224 INFO L226 Difference]: Without dead ends: 2653 [2021-06-12 21:01:59,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1239.9ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:01:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-06-12 21:01:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 712. [2021-06-12 21:01:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 2.3544303797468356) internal successors, (1674), 711 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1674 transitions. [2021-06-12 21:01:59,237 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1674 transitions. Word has length 35 [2021-06-12 21:01:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:01:59,237 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 1674 transitions. [2021-06-12 21:01:59,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:01:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1674 transitions. [2021-06-12 21:01:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:01:59,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:01:59,238 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:01:59,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 21:01:59,457 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:01:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:01:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 28 times [2021-06-12 21:01:59,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:01:59,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670896823] [2021-06-12 21:01:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:01:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:01:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:59,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:01:59,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670896823] [2021-06-12 21:01:59,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670896823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:59,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527784678] [2021-06-12 21:01:59,562 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 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 [2021-06-12 21:01:59,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:01:59,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:01:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:01:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:01:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:01:59,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527784678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:01:59,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:01:59,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 21:01:59,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16047174] [2021-06-12 21:01:59,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:01:59,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:01:59,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:01:59,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:01:59,872 INFO L87 Difference]: Start difference. First operand 712 states and 1674 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:01,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:01,031 INFO L93 Difference]: Finished difference Result 3359 states and 7152 transitions. [2021-06-12 21:02:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:02:01,031 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 21:02:01,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:01,035 INFO L225 Difference]: With dead ends: 3359 [2021-06-12 21:02:01,035 INFO L226 Difference]: Without dead ends: 3170 [2021-06-12 21:02:01,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1083.7ms TimeCoverageRelationStatistics Valid=1137, Invalid=4869, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 21:02:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-06-12 21:02:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 740. [2021-06-12 21:02:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.266576454668471) internal successors, (1675), 739 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1675 transitions. [2021-06-12 21:02:01,051 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1675 transitions. Word has length 35 [2021-06-12 21:02:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:01,051 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1675 transitions. [2021-06-12 21:02:01,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1675 transitions. [2021-06-12 21:02:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 21:02:01,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:01,052 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:01,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:02:01,257 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1190311629, now seen corresponding path program 29 times [2021-06-12 21:02:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:01,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22121851] [2021-06-12 21:02:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:01,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:01,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22121851] [2021-06-12 21:02:01,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22121851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:01,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756698323] [2021-06-12 21:02:01,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:01,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:02:01,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:02:01,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756698323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:01,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:01,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-06-12 21:02:01,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768957331] [2021-06-12 21:02:01,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:02:01,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:02:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:02:01,665 INFO L87 Difference]: Start difference. First operand 740 states and 1675 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2021-06-12 21:02:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:03,234 INFO L93 Difference]: Finished difference Result 2167 states and 4649 transitions. [2021-06-12 21:02:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 21:02:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 35 [2021-06-12 21:02:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:03,246 INFO L225 Difference]: With dead ends: 2167 [2021-06-12 21:02:03,246 INFO L226 Difference]: Without dead ends: 2163 [2021-06-12 21:02:03,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 1461.9ms TimeCoverageRelationStatistics Valid=1854, Invalid=6518, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 21:02:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-12 21:02:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 800. [2021-06-12 21:02:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3204005006257824) internal successors, (1854), 799 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) [2021-06-12 21:02:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1854 transitions. [2021-06-12 21:02:03,258 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1854 transitions. Word has length 35 [2021-06-12 21:02:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:03,258 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1854 transitions. [2021-06-12 21:02:03,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2021-06-12 21:02:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1854 transitions. [2021-06-12 21:02:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 21:02:03,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:03,260 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:03,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:02:03,475 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 30 times [2021-06-12 21:02:03,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:03,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436983927] [2021-06-12 21:02:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436983927] [2021-06-12 21:02:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436983927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061874712] [2021-06-12 21:02:03,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:03,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:02:03,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:03,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 21:02:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061874712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:03,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:03,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-12 21:02:03,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083593595] [2021-06-12 21:02:03,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:02:03,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:03,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:02:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:02:03,973 INFO L87 Difference]: Start difference. First operand 800 states and 1854 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:05,429 INFO L93 Difference]: Finished difference Result 1623 states and 3425 transitions. [2021-06-12 21:02:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 21:02:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 21:02:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:05,431 INFO L225 Difference]: With dead ends: 1623 [2021-06-12 21:02:05,431 INFO L226 Difference]: Without dead ends: 1515 [2021-06-12 21:02:05,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 1357.1ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 21:02:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-12 21:02:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 807. [2021-06-12 21:02:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3089330024813894) internal successors, (1861), 806 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1861 transitions. [2021-06-12 21:02:05,441 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1861 transitions. Word has length 37 [2021-06-12 21:02:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:05,441 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1861 transitions. [2021-06-12 21:02:05,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1861 transitions. [2021-06-12 21:02:05,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 21:02:05,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:05,442 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:05,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:05,658 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 31 times [2021-06-12 21:02:05,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:05,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254734873] [2021-06-12 21:02:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:05,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:05,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254734873] [2021-06-12 21:02:05,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254734873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:05,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802871348] [2021-06-12 21:02:05,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:02:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:02:05,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:05,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802871348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:05,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:05,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-12 21:02:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974294064] [2021-06-12 21:02:05,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:02:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:02:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:02:05,995 INFO L87 Difference]: Start difference. First operand 807 states and 1861 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:07,263 INFO L93 Difference]: Finished difference Result 1315 states and 2845 transitions. [2021-06-12 21:02:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 21:02:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 21:02:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:07,266 INFO L225 Difference]: With dead ends: 1315 [2021-06-12 21:02:07,266 INFO L226 Difference]: Without dead ends: 1311 [2021-06-12 21:02:07,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1235.5ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 21:02:07,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-06-12 21:02:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 787. [2021-06-12 21:02:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.3155216284987277) internal successors, (1820), 786 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1820 transitions. [2021-06-12 21:02:07,276 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1820 transitions. Word has length 37 [2021-06-12 21:02:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:07,276 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1820 transitions. [2021-06-12 21:02:07,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1820 transitions. [2021-06-12 21:02:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 21:02:07,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:07,278 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:07,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 21:02:07,493 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:07,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:07,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1424137007, now seen corresponding path program 32 times [2021-06-12 21:02:07,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:07,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762644371] [2021-06-12 21:02:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:02:07,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762644371] [2021-06-12 21:02:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762644371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394316511] [2021-06-12 21:02:07,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:07,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:02:07,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:07,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 21:02:07,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:07,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394316511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:07,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:07,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-06-12 21:02:07,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672649877] [2021-06-12 21:02:07,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:02:07,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:02:07,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:02:07,841 INFO L87 Difference]: Start difference. First operand 787 states and 1820 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:08,881 INFO L93 Difference]: Finished difference Result 2091 states and 4512 transitions. [2021-06-12 21:02:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:02:08,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 21:02:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:08,884 INFO L225 Difference]: With dead ends: 2091 [2021-06-12 21:02:08,884 INFO L226 Difference]: Without dead ends: 2082 [2021-06-12 21:02:08,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=894, Invalid=3528, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:02:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2021-06-12 21:02:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1285. [2021-06-12 21:02:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.367601246105919) internal successors, (3040), 1284 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3040 transitions. [2021-06-12 21:02:08,899 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3040 transitions. Word has length 37 [2021-06-12 21:02:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:08,900 INFO L482 AbstractCegarLoop]: Abstraction has 1285 states and 3040 transitions. [2021-06-12 21:02:08,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3040 transitions. [2021-06-12 21:02:08,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:02:08,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:08,901 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:09,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 21:02:09,113 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-06-12 21:02:09,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:09,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127154131] [2021-06-12 21:02:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:09,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:09,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127154131] [2021-06-12 21:02:09,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127154131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:09,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142542209] [2021-06-12 21:02:09,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:02:09,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:02:09,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:02:09,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:09,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142542209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:09,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:09,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-06-12 21:02:09,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142807546] [2021-06-12 21:02:09,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:02:09,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:09,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:02:09,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:02:09,349 INFO L87 Difference]: Start difference. First operand 1285 states and 3040 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:09,465 INFO L93 Difference]: Finished difference Result 1931 states and 4496 transitions. [2021-06-12 21:02:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:02:09,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:02:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:09,467 INFO L225 Difference]: With dead ends: 1931 [2021-06-12 21:02:09,467 INFO L226 Difference]: Without dead ends: 1874 [2021-06-12 21:02:09,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:02:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-06-12 21:02:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1608. [2021-06-12 21:02:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.40261356565028) internal successors, (3861), 1607 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 3861 transitions. [2021-06-12 21:02:09,486 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 3861 transitions. Word has length 39 [2021-06-12 21:02:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:09,486 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 3861 transitions. [2021-06-12 21:02:09,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 3861 transitions. [2021-06-12 21:02:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:02:09,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:09,488 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:09,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:02:09,700 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:09,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 34 times [2021-06-12 21:02:09,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:09,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775655632] [2021-06-12 21:02:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:09,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:09,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775655632] [2021-06-12 21:02:09,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775655632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:09,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007997932] [2021-06-12 21:02:09,800 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 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 [2021-06-12 21:02:09,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:02:09,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:02:09,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:10,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007997932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:10,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:10,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-06-12 21:02:10,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046247331] [2021-06-12 21:02:10,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:02:10,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:02:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:02:10,214 INFO L87 Difference]: Start difference. First operand 1608 states and 3861 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:12,257 INFO L93 Difference]: Finished difference Result 3088 states and 6943 transitions. [2021-06-12 21:02:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 21:02:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:02:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:12,266 INFO L225 Difference]: With dead ends: 3088 [2021-06-12 21:02:12,266 INFO L226 Difference]: Without dead ends: 3084 [2021-06-12 21:02:12,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 1551.3ms TimeCoverageRelationStatistics Valid=1013, Invalid=6819, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 21:02:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2021-06-12 21:02:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 1766. [2021-06-12 21:02:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.424929178470255) internal successors, (4280), 1765 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4280 transitions. [2021-06-12 21:02:12,288 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4280 transitions. Word has length 39 [2021-06-12 21:02:12,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:12,288 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4280 transitions. [2021-06-12 21:02:12,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:12,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4280 transitions. [2021-06-12 21:02:12,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:02:12,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:12,290 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:12,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 21:02:12,506 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:12,506 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 35 times [2021-06-12 21:02:12,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:12,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889360912] [2021-06-12 21:02:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:12,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:12,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889360912] [2021-06-12 21:02:12,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889360912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:12,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138675748] [2021-06-12 21:02:12,636 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 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 [2021-06-12 21:02:12,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 21:02:12,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:12,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:02:12,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:12,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138675748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:12,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:12,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-06-12 21:02:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621370500] [2021-06-12 21:02:12,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:02:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:02:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:02:12,989 INFO L87 Difference]: Start difference. First operand 1766 states and 4280 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:15,371 INFO L93 Difference]: Finished difference Result 4762 states and 10494 transitions. [2021-06-12 21:02:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 21:02:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:02:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:15,377 INFO L225 Difference]: With dead ends: 4762 [2021-06-12 21:02:15,377 INFO L226 Difference]: Without dead ends: 4714 [2021-06-12 21:02:15,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3935 ImplicationChecksByTransitivity, 1799.3ms TimeCoverageRelationStatistics Valid=1852, Invalid=9704, Unknown=0, NotChecked=0, Total=11556 [2021-06-12 21:02:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-06-12 21:02:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 1566. [2021-06-12 21:02:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.4255591054313097) internal successors, (3796), 1565 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 3796 transitions. [2021-06-12 21:02:15,401 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 3796 transitions. Word has length 39 [2021-06-12 21:02:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:15,401 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 3796 transitions. [2021-06-12 21:02:15,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 3796 transitions. [2021-06-12 21:02:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:02:15,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:15,403 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:15,617 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 36 times [2021-06-12 21:02:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771378721] [2021-06-12 21:02:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:15,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:15,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771378721] [2021-06-12 21:02:15,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771378721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:15,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106415442] [2021-06-12 21:02:15,739 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 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 [2021-06-12 21:02:15,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:02:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 21:02:15,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:16,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106415442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:16,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:16,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 21:02:16,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273620750] [2021-06-12 21:02:16,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:02:16,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:16,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:02:16,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:02:16,080 INFO L87 Difference]: Start difference. First operand 1566 states and 3796 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:17,834 INFO L93 Difference]: Finished difference Result 5523 states and 12031 transitions. [2021-06-12 21:02:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 21:02:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:02:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:17,839 INFO L225 Difference]: With dead ends: 5523 [2021-06-12 21:02:17,839 INFO L226 Difference]: Without dead ends: 5397 [2021-06-12 21:02:17,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1455.6ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 21:02:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-12 21:02:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 1582. [2021-06-12 21:02:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.4212523719165087) internal successors, (3828), 1581 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3828 transitions. [2021-06-12 21:02:17,868 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3828 transitions. Word has length 39 [2021-06-12 21:02:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:17,868 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3828 transitions. [2021-06-12 21:02:17,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3828 transitions. [2021-06-12 21:02:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:02:17,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:17,869 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:18,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 21:02:18,085 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:18,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:18,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 37 times [2021-06-12 21:02:18,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:18,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056726186] [2021-06-12 21:02:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:18,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:18,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056726186] [2021-06-12 21:02:18,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056726186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:18,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990017622] [2021-06-12 21:02:18,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:02:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:18,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:02:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:18,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990017622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:18,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:18,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-12 21:02:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863183345] [2021-06-12 21:02:18,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 21:02:18,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 21:02:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:02:18,615 INFO L87 Difference]: Start difference. First operand 1582 states and 3828 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:20,282 INFO L93 Difference]: Finished difference Result 5929 states and 13118 transitions. [2021-06-12 21:02:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 21:02:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:02:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:20,287 INFO L225 Difference]: With dead ends: 5929 [2021-06-12 21:02:20,287 INFO L226 Difference]: Without dead ends: 5656 [2021-06-12 21:02:20,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 1531.8ms TimeCoverageRelationStatistics Valid=1779, Invalid=7533, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 21:02:20,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-06-12 21:02:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 1758. [2021-06-12 21:02:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 2.363118952760387) internal successors, (4152), 1757 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 4152 transitions. [2021-06-12 21:02:20,314 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 4152 transitions. Word has length 39 [2021-06-12 21:02:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:20,315 INFO L482 AbstractCegarLoop]: Abstraction has 1758 states and 4152 transitions. [2021-06-12 21:02:20,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 4152 transitions. [2021-06-12 21:02:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 21:02:20,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:20,317 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:20,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-12 21:02:20,533 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 38 times [2021-06-12 21:02:20,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891411274] [2021-06-12 21:02:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:20,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:20,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891411274] [2021-06-12 21:02:20,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891411274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:20,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663135435] [2021-06-12 21:02:20,606 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 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 [2021-06-12 21:02:20,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:02:20,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 21:02:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:20,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663135435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:20,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:20,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-06-12 21:02:20,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281563655] [2021-06-12 21:02:20,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:02:20,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:02:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:02:20,966 INFO L87 Difference]: Start difference. First operand 1758 states and 4152 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:23,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:23,270 INFO L93 Difference]: Finished difference Result 3958 states and 8761 transitions. [2021-06-12 21:02:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 21:02:23,271 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 21:02:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:23,274 INFO L225 Difference]: With dead ends: 3958 [2021-06-12 21:02:23,274 INFO L226 Difference]: Without dead ends: 3954 [2021-06-12 21:02:23,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2132.2ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-06-12 21:02:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-06-12 21:02:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 1848. [2021-06-12 21:02:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1848 states, 1847 states have (on average 2.3892799133730374) internal successors, (4413), 1847 states have internal predecessors, (4413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1848 states to 1848 states and 4413 transitions. [2021-06-12 21:02:23,295 INFO L78 Accepts]: Start accepts. Automaton has 1848 states and 4413 transitions. Word has length 39 [2021-06-12 21:02:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:23,295 INFO L482 AbstractCegarLoop]: Abstraction has 1848 states and 4413 transitions. [2021-06-12 21:02:23,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1848 states and 4413 transitions. [2021-06-12 21:02:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:02:23,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:23,297 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:23,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:23,513 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:23,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:23,513 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 39 times [2021-06-12 21:02:23,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:23,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683716249] [2021-06-12 21:02:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:23,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:23,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683716249] [2021-06-12 21:02:23,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683716249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:23,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379235548] [2021-06-12 21:02:23,635 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 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 [2021-06-12 21:02:23,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:02:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:02:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:23,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379235548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:23,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:23,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-12 21:02:23,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591380088] [2021-06-12 21:02:23,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:02:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:02:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:02:23,999 INFO L87 Difference]: Start difference. First operand 1848 states and 4413 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:25,872 INFO L93 Difference]: Finished difference Result 3268 states and 7276 transitions. [2021-06-12 21:02:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 21:02:25,872 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:02:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:25,874 INFO L225 Difference]: With dead ends: 3268 [2021-06-12 21:02:25,874 INFO L226 Difference]: Without dead ends: 3049 [2021-06-12 21:02:25,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1749.6ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 21:02:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-12 21:02:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1787. [2021-06-12 21:02:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.379619260918253) internal successors, (4250), 1786 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4250 transitions. [2021-06-12 21:02:25,893 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4250 transitions. Word has length 41 [2021-06-12 21:02:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:25,893 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 4250 transitions. [2021-06-12 21:02:25,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4250 transitions. [2021-06-12 21:02:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:02:25,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:25,895 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:26,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 21:02:26,101 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 40 times [2021-06-12 21:02:26,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:26,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838538967] [2021-06-12 21:02:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:26,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:26,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838538967] [2021-06-12 21:02:26,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838538967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:26,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556505431] [2021-06-12 21:02:26,174 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 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 [2021-06-12 21:02:26,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:02:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:02:26,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:26,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556505431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:26,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:26,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-06-12 21:02:26,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102953756] [2021-06-12 21:02:26,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:02:26,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:02:26,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:02:26,535 INFO L87 Difference]: Start difference. First operand 1787 states and 4250 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:28,340 INFO L93 Difference]: Finished difference Result 2437 states and 5514 transitions. [2021-06-12 21:02:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 21:02:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:02:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:28,342 INFO L225 Difference]: With dead ends: 2437 [2021-06-12 21:02:28,342 INFO L226 Difference]: Without dead ends: 2433 [2021-06-12 21:02:28,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 1719.4ms TimeCoverageRelationStatistics Valid=2626, Invalid=8504, Unknown=0, NotChecked=0, Total=11130 [2021-06-12 21:02:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-12 21:02:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1763. [2021-06-12 21:02:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 2.38422247446084) internal successors, (4201), 1762 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4201 transitions. [2021-06-12 21:02:28,359 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4201 transitions. Word has length 41 [2021-06-12 21:02:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:28,359 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4201 transitions. [2021-06-12 21:02:28,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:28,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4201 transitions. [2021-06-12 21:02:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:28,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:28,361 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:28,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:28,578 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 41 times [2021-06-12 21:02:28,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:28,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812253320] [2021-06-12 21:02:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:28,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:28,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812253320] [2021-06-12 21:02:28,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812253320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:28,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891193253] [2021-06-12 21:02:28,652 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 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 [2021-06-12 21:02:28,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:02:28,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 21:02:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:28,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891193253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:28,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:28,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 21:02:28,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957847973] [2021-06-12 21:02:28,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:02:28,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:28,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:02:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:02:28,737 INFO L87 Difference]: Start difference. First operand 1763 states and 4201 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-06-12 21:02:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:28,813 INFO L93 Difference]: Finished difference Result 2486 states and 5827 transitions. [2021-06-12 21:02:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:02:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 43 [2021-06-12 21:02:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:28,816 INFO L225 Difference]: With dead ends: 2486 [2021-06-12 21:02:28,817 INFO L226 Difference]: Without dead ends: 2429 [2021-06-12 21:02:28,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:02:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-12 21:02:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2196. [2021-06-12 21:02:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.4314350797266515) internal successors, (5337), 2195 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5337 transitions. [2021-06-12 21:02:28,841 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5337 transitions. Word has length 43 [2021-06-12 21:02:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:28,842 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 5337 transitions. [2021-06-12 21:02:28,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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) [2021-06-12 21:02:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5337 transitions. [2021-06-12 21:02:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:28,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:28,845 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:29,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 21:02:29,061 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 42 times [2021-06-12 21:02:29,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:29,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417316356] [2021-06-12 21:02:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:29,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417316356] [2021-06-12 21:02:29,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417316356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705282535] [2021-06-12 21:02:29,209 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 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 [2021-06-12 21:02:29,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 21:02:29,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:29,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 21:02:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705282535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:29,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:29,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-12 21:02:29,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729358889] [2021-06-12 21:02:29,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 21:02:29,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 21:02:29,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:02:29,631 INFO L87 Difference]: Start difference. First operand 2196 states and 5337 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:32,455 INFO L93 Difference]: Finished difference Result 5082 states and 11297 transitions. [2021-06-12 21:02:32,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 21:02:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:32,460 INFO L225 Difference]: With dead ends: 5082 [2021-06-12 21:02:32,460 INFO L226 Difference]: Without dead ends: 5049 [2021-06-12 21:02:32,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 1984.6ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 21:02:32,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2021-06-12 21:02:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 2469. [2021-06-12 21:02:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2468 states have (on average 2.4315235008103726) internal successors, (6001), 2468 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 6001 transitions. [2021-06-12 21:02:32,493 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 6001 transitions. Word has length 43 [2021-06-12 21:02:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:32,494 INFO L482 AbstractCegarLoop]: Abstraction has 2469 states and 6001 transitions. [2021-06-12 21:02:32,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 6001 transitions. [2021-06-12 21:02:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:32,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:32,496 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:32,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 21:02:32,709 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 43 times [2021-06-12 21:02:32,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:32,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730814284] [2021-06-12 21:02:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:32,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:32,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730814284] [2021-06-12 21:02:32,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730814284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:32,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340435876] [2021-06-12 21:02:32,838 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:02:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 21:02:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:33,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340435876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:33,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:33,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-06-12 21:02:33,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598357412] [2021-06-12 21:02:33,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:02:33,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:33,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:02:33,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:02:33,240 INFO L87 Difference]: Start difference. First operand 2469 states and 6001 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:35,896 INFO L93 Difference]: Finished difference Result 4063 states and 9266 transitions. [2021-06-12 21:02:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 21:02:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:35,900 INFO L225 Difference]: With dead ends: 4063 [2021-06-12 21:02:35,900 INFO L226 Difference]: Without dead ends: 4059 [2021-06-12 21:02:35,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 1762.9ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 21:02:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2021-06-12 21:02:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 2259. [2021-06-12 21:02:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.425597874224978) internal successors, (5477), 2258 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:35,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 5477 transitions. [2021-06-12 21:02:35,925 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 5477 transitions. Word has length 43 [2021-06-12 21:02:35,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:35,925 INFO L482 AbstractCegarLoop]: Abstraction has 2259 states and 5477 transitions. [2021-06-12 21:02:35,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 5477 transitions. [2021-06-12 21:02:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:35,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:35,928 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:36,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:36,141 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 44 times [2021-06-12 21:02:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:36,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787618889] [2021-06-12 21:02:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:36,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:36,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787618889] [2021-06-12 21:02:36,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787618889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:36,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202998352] [2021-06-12 21:02:36,296 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 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 [2021-06-12 21:02:36,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:02:36,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:02:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:36,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202998352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:36,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:36,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-06-12 21:02:36,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408580111] [2021-06-12 21:02:36,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:02:36,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:36,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:02:36,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:02:36,723 INFO L87 Difference]: Start difference. First operand 2259 states and 5477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:40,002 INFO L93 Difference]: Finished difference Result 5894 states and 13012 transitions. [2021-06-12 21:02:40,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-12 21:02:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:40,008 INFO L225 Difference]: With dead ends: 5894 [2021-06-12 21:02:40,008 INFO L226 Difference]: Without dead ends: 5846 [2021-06-12 21:02:40,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 2301.2ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-06-12 21:02:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-12 21:02:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 2347. [2021-06-12 21:02:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 2.411764705882353) internal successors, (5658), 2346 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 5658 transitions. [2021-06-12 21:02:40,045 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 5658 transitions. Word has length 43 [2021-06-12 21:02:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:40,045 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 5658 transitions. [2021-06-12 21:02:40,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 5658 transitions. [2021-06-12 21:02:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:40,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:40,047 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:40,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 21:02:40,248 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:40,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:40,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 45 times [2021-06-12 21:02:40,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:40,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277085654] [2021-06-12 21:02:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:40,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:40,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277085654] [2021-06-12 21:02:40,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277085654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:40,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691309330] [2021-06-12 21:02:40,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:40,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 21:02:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:02:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:40,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691309330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:40,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:40,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-12 21:02:40,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519442880] [2021-06-12 21:02:40,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:02:40,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:02:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:02:40,800 INFO L87 Difference]: Start difference. First operand 2347 states and 5658 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:43,529 INFO L93 Difference]: Finished difference Result 7652 states and 16783 transitions. [2021-06-12 21:02:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 21:02:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:43,536 INFO L225 Difference]: With dead ends: 7652 [2021-06-12 21:02:43,536 INFO L226 Difference]: Without dead ends: 7478 [2021-06-12 21:02:43,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5177 ImplicationChecksByTransitivity, 2151.4ms TimeCoverageRelationStatistics Valid=2370, Invalid=12636, Unknown=0, NotChecked=0, Total=15006 [2021-06-12 21:02:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-12 21:02:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 2225. [2021-06-12 21:02:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 2.428956834532374) internal successors, (5402), 2224 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 5402 transitions. [2021-06-12 21:02:43,579 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 5402 transitions. Word has length 43 [2021-06-12 21:02:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:43,579 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 5402 transitions. [2021-06-12 21:02:43,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 5402 transitions. [2021-06-12 21:02:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:43,581 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:43,581 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:43,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:43,781 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:43,782 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 46 times [2021-06-12 21:02:43,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:43,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661485706] [2021-06-12 21:02:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:43,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:43,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661485706] [2021-06-12 21:02:43,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661485706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:43,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597230343] [2021-06-12 21:02:43,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:43,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:02:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:02:43,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597230343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:44,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:44,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 21:02:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312546423] [2021-06-12 21:02:44,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 21:02:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 21:02:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:02:44,342 INFO L87 Difference]: Start difference. First operand 2225 states and 5402 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:46,613 INFO L93 Difference]: Finished difference Result 8464 states and 18466 transitions. [2021-06-12 21:02:46,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 21:02:46,614 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:46,620 INFO L225 Difference]: With dead ends: 8464 [2021-06-12 21:02:46,620 INFO L226 Difference]: Without dead ends: 8230 [2021-06-12 21:02:46,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4591 ImplicationChecksByTransitivity, 1876.7ms TimeCoverageRelationStatistics Valid=2344, Invalid=10996, Unknown=0, NotChecked=0, Total=13340 [2021-06-12 21:02:46,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-06-12 21:02:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 2241. [2021-06-12 21:02:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 2.4258928571428573) internal successors, (5434), 2240 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 5434 transitions. [2021-06-12 21:02:46,658 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 5434 transitions. Word has length 43 [2021-06-12 21:02:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:46,658 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 5434 transitions. [2021-06-12 21:02:46,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 5434 transitions. [2021-06-12 21:02:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:46,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:46,660 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:46,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 21:02:46,873 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 47 times [2021-06-12 21:02:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:46,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330802463] [2021-06-12 21:02:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:47,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330802463] [2021-06-12 21:02:47,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330802463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964683229] [2021-06-12 21:02:47,016 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 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 [2021-06-12 21:02:47,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:02:47,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:02:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:47,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964683229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:47,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:47,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-12 21:02:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211065196] [2021-06-12 21:02:47,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:02:47,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:02:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:02:47,401 INFO L87 Difference]: Start difference. First operand 2241 states and 5434 transitions. Second operand has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:49,839 INFO L93 Difference]: Finished difference Result 7868 states and 17355 transitions. [2021-06-12 21:02:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-12 21:02:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:49,846 INFO L225 Difference]: With dead ends: 7868 [2021-06-12 21:02:49,846 INFO L226 Difference]: Without dead ends: 7508 [2021-06-12 21:02:49,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 2202.1ms TimeCoverageRelationStatistics Valid=3415, Invalid=13615, Unknown=0, NotChecked=0, Total=17030 [2021-06-12 21:02:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-12 21:02:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 2254. [2021-06-12 21:02:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.361739902352419) internal successors, (5321), 2253 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5321 transitions. [2021-06-12 21:02:49,884 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5321 transitions. Word has length 43 [2021-06-12 21:02:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:49,884 INFO L482 AbstractCegarLoop]: Abstraction has 2254 states and 5321 transitions. [2021-06-12 21:02:49,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.076923076923077) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:49,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5321 transitions. [2021-06-12 21:02:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 21:02:49,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:49,886 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:50,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:50,102 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:50,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 48 times [2021-06-12 21:02:50,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:50,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647528972] [2021-06-12 21:02:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:50,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647528972] [2021-06-12 21:02:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647528972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073785241] [2021-06-12 21:02:50,208 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 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 [2021-06-12 21:02:50,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 21:02:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 21:02:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:50,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073785241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:50,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:50,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-06-12 21:02:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643155899] [2021-06-12 21:02:50,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:02:50,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:02:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:02:50,631 INFO L87 Difference]: Start difference. First operand 2254 states and 5321 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:53,998 INFO L93 Difference]: Finished difference Result 5015 states and 11067 transitions. [2021-06-12 21:02:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-12 21:02:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 21:02:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:54,002 INFO L225 Difference]: With dead ends: 5015 [2021-06-12 21:02:54,003 INFO L226 Difference]: Without dead ends: 5011 [2021-06-12 21:02:54,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3110.6ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-06-12 21:02:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-12 21:02:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2303. [2021-06-12 21:02:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.385317115551694) internal successors, (5491), 2302 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 5491 transitions. [2021-06-12 21:02:54,029 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 5491 transitions. Word has length 43 [2021-06-12 21:02:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:54,029 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 5491 transitions. [2021-06-12 21:02:54,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 5491 transitions. [2021-06-12 21:02:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:02:54,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:54,031 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:54,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:54,238 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:54,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:54,238 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 49 times [2021-06-12 21:02:54,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:54,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135723368] [2021-06-12 21:02:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:54,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:54,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135723368] [2021-06-12 21:02:54,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135723368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:54,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65457266] [2021-06-12 21:02:54,406 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 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 [2021-06-12 21:02:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:54,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:02:54,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65457266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-12 21:02:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235421694] [2021-06-12 21:02:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:02:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:02:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:02:54,887 INFO L87 Difference]: Start difference. First operand 2303 states and 5491 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:02:57,448 INFO L93 Difference]: Finished difference Result 3620 states and 8022 transitions. [2021-06-12 21:02:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 21:02:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:02:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:02:57,451 INFO L225 Difference]: With dead ends: 3620 [2021-06-12 21:02:57,451 INFO L226 Difference]: Without dead ends: 3422 [2021-06-12 21:02:57,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6324 ImplicationChecksByTransitivity, 2397.2ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-06-12 21:02:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-12 21:02:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2306. [2021-06-12 21:02:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3800433839479394) internal successors, (5486), 2305 states have internal predecessors, (5486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5486 transitions. [2021-06-12 21:02:57,474 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5486 transitions. Word has length 45 [2021-06-12 21:02:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:02:57,475 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5486 transitions. [2021-06-12 21:02:57,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:02:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5486 transitions. [2021-06-12 21:02:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:02:57,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:02:57,477 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:02:57,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:02:57,692 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:02:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:02:57,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 50 times [2021-06-12 21:02:57,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:02:57,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449295073] [2021-06-12 21:02:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:02:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:02:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:57,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:02:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449295073] [2021-06-12 21:02:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449295073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646679313] [2021-06-12 21:02:57,776 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 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 [2021-06-12 21:02:57,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:02:57,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:02:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 21:02:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:02:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:02:58,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646679313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:02:58,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:02:58,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-06-12 21:02:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099711323] [2021-06-12 21:02:58,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:02:58,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:02:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:02:58,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:02:58,216 INFO L87 Difference]: Start difference. First operand 2306 states and 5486 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:00,609 INFO L93 Difference]: Finished difference Result 3140 states and 7114 transitions. [2021-06-12 21:03:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 21:03:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:03:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:00,614 INFO L225 Difference]: With dead ends: 3140 [2021-06-12 21:03:00,614 INFO L226 Difference]: Without dead ends: 3136 [2021-06-12 21:03:00,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2268.6ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-06-12 21:03:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-12 21:03:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2306. [2021-06-12 21:03:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.3796095444685466) internal successors, (5485), 2305 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 5485 transitions. [2021-06-12 21:03:00,643 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 5485 transitions. Word has length 45 [2021-06-12 21:03:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:00,643 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 5485 transitions. [2021-06-12 21:03:00,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 5485 transitions. [2021-06-12 21:03:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:03:00,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:00,645 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:00,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:00,845 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:00,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:00,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1657156185, now seen corresponding path program 51 times [2021-06-12 21:03:00,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:00,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321240806] [2021-06-12 21:03:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:03:00,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321240806] [2021-06-12 21:03:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321240806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137116393] [2021-06-12 21:03:00,926 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 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 [2021-06-12 21:03:00,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 21:03:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 21:03:00,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:01,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137116393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:01,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:01,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-12 21:03:01,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738115543] [2021-06-12 21:03:01,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 21:03:01,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 21:03:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:03:01,372 INFO L87 Difference]: Start difference. First operand 2306 states and 5485 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:03,716 INFO L93 Difference]: Finished difference Result 6205 states and 13891 transitions. [2021-06-12 21:03:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-12 21:03:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:03:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:03,721 INFO L225 Difference]: With dead ends: 6205 [2021-06-12 21:03:03,721 INFO L226 Difference]: Without dead ends: 6205 [2021-06-12 21:03:03,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 2203.2ms TimeCoverageRelationStatistics Valid=3242, Invalid=10098, Unknown=0, NotChecked=0, Total=13340 [2021-06-12 21:03:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-06-12 21:03:03,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 3688. [2021-06-12 21:03:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.414429075128831) internal successors, (8902), 3687 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 8902 transitions. [2021-06-12 21:03:03,759 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 8902 transitions. Word has length 45 [2021-06-12 21:03:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:03,759 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 8902 transitions. [2021-06-12 21:03:03,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 32 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:03,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 8902 transitions. [2021-06-12 21:03:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:03,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:03,763 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:03,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 21:03:03,963 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 52 times [2021-06-12 21:03:03,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:03,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98224221] [2021-06-12 21:03:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:04,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:04,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98224221] [2021-06-12 21:03:04,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98224221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:04,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575053141] [2021-06-12 21:03:04,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:04,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:03:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:03:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575053141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:04,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:04,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 21:03:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160919699] [2021-06-12 21:03:04,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:03:04,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:03:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:03:04,147 INFO L87 Difference]: Start difference. First operand 3688 states and 8902 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:04,257 INFO L93 Difference]: Finished difference Result 4861 states and 11682 transitions. [2021-06-12 21:03:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:03:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:04,262 INFO L225 Difference]: With dead ends: 4861 [2021-06-12 21:03:04,262 INFO L226 Difference]: Without dead ends: 4798 [2021-06-12 21:03:04,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:03:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-06-12 21:03:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4433. [2021-06-12 21:03:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4433 states, 4432 states have (on average 2.4490072202166067) internal successors, (10854), 4432 states have internal predecessors, (10854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4433 states to 4433 states and 10854 transitions. [2021-06-12 21:03:04,307 INFO L78 Accepts]: Start accepts. Automaton has 4433 states and 10854 transitions. Word has length 47 [2021-06-12 21:03:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:04,307 INFO L482 AbstractCegarLoop]: Abstraction has 4433 states and 10854 transitions. [2021-06-12 21:03:04,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:04,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4433 states and 10854 transitions. [2021-06-12 21:03:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:04,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:04,311 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:04,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:04,512 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 53 times [2021-06-12 21:03:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:04,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896289861] [2021-06-12 21:03:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:04,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:04,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896289861] [2021-06-12 21:03:04,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896289861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:04,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455393051] [2021-06-12 21:03:04,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:04,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 21:03:04,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:03:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:05,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455393051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:05,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:05,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-12 21:03:05,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233529960] [2021-06-12 21:03:05,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:03:05,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:05,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:03:05,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:03:05,312 INFO L87 Difference]: Start difference. First operand 4433 states and 10854 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:08,279 INFO L93 Difference]: Finished difference Result 5913 states and 13861 transitions. [2021-06-12 21:03:08,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 21:03:08,280 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:08,285 INFO L225 Difference]: With dead ends: 5913 [2021-06-12 21:03:08,285 INFO L226 Difference]: Without dead ends: 5907 [2021-06-12 21:03:08,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 2204.0ms TimeCoverageRelationStatistics Valid=978, Invalid=10152, Unknown=0, NotChecked=0, Total=11130 [2021-06-12 21:03:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2021-06-12 21:03:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 4386. [2021-06-12 21:03:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4385 states have (on average 2.4408209806157353) internal successors, (10703), 4385 states have internal predecessors, (10703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 10703 transitions. [2021-06-12 21:03:08,330 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 10703 transitions. Word has length 47 [2021-06-12 21:03:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:08,330 INFO L482 AbstractCegarLoop]: Abstraction has 4386 states and 10703 transitions. [2021-06-12 21:03:08,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 10703 transitions. [2021-06-12 21:03:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:08,334 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:08,334 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:08,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:08,535 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 54 times [2021-06-12 21:03:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935488084] [2021-06-12 21:03:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:08,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935488084] [2021-06-12 21:03:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935488084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:08,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721778659] [2021-06-12 21:03:08,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:08,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 21:03:08,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 21:03:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:09,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721778659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:09,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:09,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-06-12 21:03:09,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769910136] [2021-06-12 21:03:09,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 21:03:09,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 21:03:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:03:09,182 INFO L87 Difference]: Start difference. First operand 4386 states and 10703 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:13,273 INFO L93 Difference]: Finished difference Result 8676 states and 19853 transitions. [2021-06-12 21:03:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 21:03:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:13,282 INFO L225 Difference]: With dead ends: 8676 [2021-06-12 21:03:13,282 INFO L226 Difference]: Without dead ends: 8652 [2021-06-12 21:03:13,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 2429.4ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-06-12 21:03:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2021-06-12 21:03:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 4780. [2021-06-12 21:03:13,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 2.446746181209458) internal successors, (11693), 4779 states have internal predecessors, (11693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 11693 transitions. [2021-06-12 21:03:13,339 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 11693 transitions. Word has length 47 [2021-06-12 21:03:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:13,339 INFO L482 AbstractCegarLoop]: Abstraction has 4780 states and 11693 transitions. [2021-06-12 21:03:13,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 11693 transitions. [2021-06-12 21:03:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:13,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:13,343 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:13,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:13,545 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:13,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:13,545 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 55 times [2021-06-12 21:03:13,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:13,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610846519] [2021-06-12 21:03:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:13,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610846519] [2021-06-12 21:03:13,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610846519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079958496] [2021-06-12 21:03:13,673 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 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 [2021-06-12 21:03:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:13,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 21:03:13,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:14,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079958496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:14,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:14,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-06-12 21:03:14,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154785490] [2021-06-12 21:03:14,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:03:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:03:14,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:03:14,202 INFO L87 Difference]: Start difference. First operand 4780 states and 11693 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:17,112 INFO L93 Difference]: Finished difference Result 6903 states and 16158 transitions. [2021-06-12 21:03:17,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 21:03:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:17,118 INFO L225 Difference]: With dead ends: 6903 [2021-06-12 21:03:17,118 INFO L226 Difference]: Without dead ends: 6899 [2021-06-12 21:03:17,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2094.0ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-06-12 21:03:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6899 states. [2021-06-12 21:03:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6899 to 4480. [2021-06-12 21:03:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.444965394061174) internal successors, (10951), 4479 states have internal predecessors, (10951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 10951 transitions. [2021-06-12 21:03:17,176 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 10951 transitions. Word has length 47 [2021-06-12 21:03:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:17,177 INFO L482 AbstractCegarLoop]: Abstraction has 4480 states and 10951 transitions. [2021-06-12 21:03:17,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 10951 transitions. [2021-06-12 21:03:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:17,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:17,181 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:17,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 21:03:17,385 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 56 times [2021-06-12 21:03:17,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:17,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686414254] [2021-06-12 21:03:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:17,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686414254] [2021-06-12 21:03:17,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686414254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:17,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924361791] [2021-06-12 21:03:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:17,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:03:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:03:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:18,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924361791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:18,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:18,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-06-12 21:03:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806622659] [2021-06-12 21:03:18,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 21:03:18,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:18,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 21:03:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:03:18,058 INFO L87 Difference]: Start difference. First operand 4480 states and 10951 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:22,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:22,402 INFO L93 Difference]: Finished difference Result 10549 states and 24047 transitions. [2021-06-12 21:03:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-12 21:03:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:22,412 INFO L225 Difference]: With dead ends: 10549 [2021-06-12 21:03:22,412 INFO L226 Difference]: Without dead ends: 10501 [2021-06-12 21:03:22,413 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 2932.8ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-06-12 21:03:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-12 21:03:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 4420. [2021-06-12 21:03:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 2.4433129667345552) internal successors, (10797), 4419 states have internal predecessors, (10797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 10797 transitions. [2021-06-12 21:03:22,484 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 10797 transitions. Word has length 47 [2021-06-12 21:03:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:22,484 INFO L482 AbstractCegarLoop]: Abstraction has 4420 states and 10797 transitions. [2021-06-12 21:03:22,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 10797 transitions. [2021-06-12 21:03:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:22,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:22,487 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:22,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 21:03:22,687 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 57 times [2021-06-12 21:03:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:22,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842638036] [2021-06-12 21:03:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:22,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:22,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842638036] [2021-06-12 21:03:22,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842638036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:22,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637900273] [2021-06-12 21:03:22,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:22,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 21:03:22,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:03:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:23,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637900273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:23,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:23,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-06-12 21:03:23,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561973] [2021-06-12 21:03:23,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:03:23,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:23,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:03:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:03:23,353 INFO L87 Difference]: Start difference. First operand 4420 states and 10797 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:27,456 INFO L93 Difference]: Finished difference Result 12102 states and 27344 transitions. [2021-06-12 21:03:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-12 21:03:27,456 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:27,465 INFO L225 Difference]: With dead ends: 12102 [2021-06-12 21:03:27,465 INFO L226 Difference]: Without dead ends: 12024 [2021-06-12 21:03:27,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 2921.2ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-06-12 21:03:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12024 states. [2021-06-12 21:03:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12024 to 4352. [2021-06-12 21:03:27,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 2.4474833371638702) internal successors, (10649), 4351 states have internal predecessors, (10649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 10649 transitions. [2021-06-12 21:03:27,523 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 10649 transitions. Word has length 47 [2021-06-12 21:03:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:27,523 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 10649 transitions. [2021-06-12 21:03:27,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 10649 transitions. [2021-06-12 21:03:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:27,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:27,526 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:27,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:27,727 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 58 times [2021-06-12 21:03:27,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:27,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400593699] [2021-06-12 21:03:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:27,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400593699] [2021-06-12 21:03:27,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400593699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240676277] [2021-06-12 21:03:27,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:27,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:03:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 21:03:27,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:28,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240676277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:28,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:28,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-06-12 21:03:28,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408712087] [2021-06-12 21:03:28,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:03:28,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:03:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:03:28,366 INFO L87 Difference]: Start difference. First operand 4352 states and 10649 transitions. Second operand has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:31,015 INFO L93 Difference]: Finished difference Result 14421 states and 32596 transitions. [2021-06-12 21:03:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-12 21:03:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:31,029 INFO L225 Difference]: With dead ends: 14421 [2021-06-12 21:03:31,029 INFO L226 Difference]: Without dead ends: 14229 [2021-06-12 21:03:31,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5672 ImplicationChecksByTransitivity, 2239.4ms TimeCoverageRelationStatistics Valid=2609, Invalid=13647, Unknown=0, NotChecked=0, Total=16256 [2021-06-12 21:03:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14229 states. [2021-06-12 21:03:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14229 to 4384. [2021-06-12 21:03:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4442162902121836) internal successors, (10713), 4383 states have internal predecessors, (10713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10713 transitions. [2021-06-12 21:03:31,104 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10713 transitions. Word has length 47 [2021-06-12 21:03:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:31,105 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 10713 transitions. [2021-06-12 21:03:31,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.225) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10713 transitions. [2021-06-12 21:03:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:31,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:31,107 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:31,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-12 21:03:31,308 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 59 times [2021-06-12 21:03:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:31,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154113463] [2021-06-12 21:03:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:31,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154113463] [2021-06-12 21:03:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154113463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159105791] [2021-06-12 21:03:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:31,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 21:03:31,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 21:03:31,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:31,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159105791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:31,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:31,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-06-12 21:03:31,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605536199] [2021-06-12 21:03:31,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:03:31,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:31,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:03:31,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:03:31,933 INFO L87 Difference]: Start difference. First operand 4384 states and 10713 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:34,949 INFO L93 Difference]: Finished difference Result 14220 states and 31957 transitions. [2021-06-12 21:03:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-12 21:03:34,950 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:34,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:34,963 INFO L225 Difference]: With dead ends: 14220 [2021-06-12 21:03:34,963 INFO L226 Difference]: Without dead ends: 13917 [2021-06-12 21:03:34,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 2616.7ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-06-12 21:03:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13917 states. [2021-06-12 21:03:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13917 to 4404. [2021-06-12 21:03:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.4421985010220304) internal successors, (10753), 4403 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 10753 transitions. [2021-06-12 21:03:35,038 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 10753 transitions. Word has length 47 [2021-06-12 21:03:35,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:35,039 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 10753 transitions. [2021-06-12 21:03:35,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 10753 transitions. [2021-06-12 21:03:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:35,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:35,042 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:35,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:35,242 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 60 times [2021-06-12 21:03:35,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:35,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173552994] [2021-06-12 21:03:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:35,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173552994] [2021-06-12 21:03:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173552994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195301450] [2021-06-12 21:03:35,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:35,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 21:03:35,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 21:03:35,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:35,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195301450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:35,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:35,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-12 21:03:35,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243432917] [2021-06-12 21:03:35,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 21:03:35,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:35,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 21:03:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:03:35,947 INFO L87 Difference]: Start difference. First operand 4404 states and 10753 transitions. Second operand has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:39,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:39,208 INFO L93 Difference]: Finished difference Result 13609 states and 30879 transitions. [2021-06-12 21:03:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-12 21:03:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:39,221 INFO L225 Difference]: With dead ends: 13609 [2021-06-12 21:03:39,221 INFO L226 Difference]: Without dead ends: 13078 [2021-06-12 21:03:39,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8506 ImplicationChecksByTransitivity, 2975.2ms TimeCoverageRelationStatistics Valid=4891, Invalid=19289, Unknown=0, NotChecked=0, Total=24180 [2021-06-12 21:03:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13078 states. [2021-06-12 21:03:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13078 to 4605. [2021-06-12 21:03:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.386185925282363) internal successors, (10986), 4604 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 10986 transitions. [2021-06-12 21:03:39,304 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 10986 transitions. Word has length 47 [2021-06-12 21:03:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:39,304 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 10986 transitions. [2021-06-12 21:03:39,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 42 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 10986 transitions. [2021-06-12 21:03:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 21:03:39,307 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:39,307 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:39,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-12 21:03:39,508 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 61 times [2021-06-12 21:03:39,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:39,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276920658] [2021-06-12 21:03:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:39,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:39,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276920658] [2021-06-12 21:03:39,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276920658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:39,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33907713] [2021-06-12 21:03:39,609 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 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 [2021-06-12 21:03:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:39,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 21:03:39,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:40,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33907713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:40,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:40,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 33 [2021-06-12 21:03:40,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185972982] [2021-06-12 21:03:40,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 21:03:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 21:03:40,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:03:40,015 INFO L87 Difference]: Start difference. First operand 4605 states and 10986 transitions. Second operand has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:42,583 INFO L93 Difference]: Finished difference Result 9014 states and 20637 transitions. [2021-06-12 21:03:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 21:03:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-12 21:03:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:42,591 INFO L225 Difference]: With dead ends: 9014 [2021-06-12 21:03:42,591 INFO L226 Difference]: Without dead ends: 9010 [2021-06-12 21:03:42,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6196 ImplicationChecksByTransitivity, 2322.7ms TimeCoverageRelationStatistics Valid=3809, Invalid=13221, Unknown=0, NotChecked=0, Total=17030 [2021-06-12 21:03:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-06-12 21:03:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4724. [2021-06-12 21:03:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4724 states, 4723 states have (on average 2.4084268473427906) internal successors, (11375), 4723 states have internal predecessors, (11375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4724 states to 4724 states and 11375 transitions. [2021-06-12 21:03:42,647 INFO L78 Accepts]: Start accepts. Automaton has 4724 states and 11375 transitions. Word has length 47 [2021-06-12 21:03:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:42,647 INFO L482 AbstractCegarLoop]: Abstraction has 4724 states and 11375 transitions. [2021-06-12 21:03:42,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4724 states and 11375 transitions. [2021-06-12 21:03:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:03:42,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:42,651 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:42,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:42,851 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 62 times [2021-06-12 21:03:42,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:42,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489747508] [2021-06-12 21:03:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:43,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:43,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489747508] [2021-06-12 21:03:43,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489747508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:43,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802476941] [2021-06-12 21:03:43,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:03:43,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:03:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 21:03:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802476941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:43,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:43,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-06-12 21:03:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636707036] [2021-06-12 21:03:43,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-12 21:03:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-12 21:03:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:03:43,564 INFO L87 Difference]: Start difference. First operand 4724 states and 11375 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:46,903 INFO L93 Difference]: Finished difference Result 6691 states and 15329 transitions. [2021-06-12 21:03:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-12 21:03:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-12 21:03:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:46,914 INFO L225 Difference]: With dead ends: 6691 [2021-06-12 21:03:46,914 INFO L226 Difference]: Without dead ends: 6421 [2021-06-12 21:03:46,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9288 ImplicationChecksByTransitivity, 3030.8ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-06-12 21:03:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-12 21:03:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4591. [2021-06-12 21:03:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.4004357298474948) internal successors, (11018), 4590 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 11018 transitions. [2021-06-12 21:03:46,960 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 11018 transitions. Word has length 49 [2021-06-12 21:03:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:46,960 INFO L482 AbstractCegarLoop]: Abstraction has 4591 states and 11018 transitions. [2021-06-12 21:03:46,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 11018 transitions. [2021-06-12 21:03:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-12 21:03:46,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:46,964 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:47,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 21:03:47,179 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:47,180 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 63 times [2021-06-12 21:03:47,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:47,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743147912] [2021-06-12 21:03:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:47,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743147912] [2021-06-12 21:03:47,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743147912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:47,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808948036] [2021-06-12 21:03:47,271 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 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 [2021-06-12 21:03:47,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 21:03:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:03:47,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 17 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:47,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808948036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:47,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:47,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23] total 34 [2021-06-12 21:03:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299683099] [2021-06-12 21:03:47,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 21:03:47,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:47,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 21:03:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:03:47,764 INFO L87 Difference]: Start difference. First operand 4591 states and 11018 transitions. Second operand has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:53,214 INFO L93 Difference]: Finished difference Result 8254 states and 18601 transitions. [2021-06-12 21:03:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-06-12 21:03:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-12 21:03:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:53,221 INFO L225 Difference]: With dead ends: 8254 [2021-06-12 21:03:53,221 INFO L226 Difference]: Without dead ends: 8250 [2021-06-12 21:03:53,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19820 ImplicationChecksByTransitivity, 4809.3ms TimeCoverageRelationStatistics Valid=9481, Invalid=36529, Unknown=0, NotChecked=0, Total=46010 [2021-06-12 21:03:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8250 states. [2021-06-12 21:03:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8250 to 4599. [2021-06-12 21:03:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4599 states, 4598 states have (on average 2.4006089604175727) internal successors, (11038), 4598 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4599 states to 4599 states and 11038 transitions. [2021-06-12 21:03:53,274 INFO L78 Accepts]: Start accepts. Automaton has 4599 states and 11038 transitions. Word has length 49 [2021-06-12 21:03:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:53,274 INFO L482 AbstractCegarLoop]: Abstraction has 4599 states and 11038 transitions. [2021-06-12 21:03:53,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4599 states and 11038 transitions. [2021-06-12 21:03:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:03:53,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:53,278 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:53,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:03:53,478 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 64 times [2021-06-12 21:03:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:53,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280789679] [2021-06-12 21:03:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:53,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:53,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280789679] [2021-06-12 21:03:53,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280789679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:53,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016438209] [2021-06-12 21:03:53,594 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 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 [2021-06-12 21:03:53,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:03:53,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:03:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:53,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016438209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:53,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:53,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 21:03:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875392902] [2021-06-12 21:03:53,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:03:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:03:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:03:53,691 INFO L87 Difference]: Start difference. First operand 4599 states and 11038 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2021-06-12 21:03:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:53,816 INFO L93 Difference]: Finished difference Result 5889 states and 14053 transitions. [2021-06-12 21:03:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:03:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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 51 [2021-06-12 21:03:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:53,821 INFO L225 Difference]: With dead ends: 5889 [2021-06-12 21:03:53,821 INFO L226 Difference]: Without dead ends: 5820 [2021-06-12 21:03:53,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:03:53,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-12 21:03:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5433. [2021-06-12 21:03:53,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 5432 states have (on average 2.43740795287187) internal successors, (13240), 5432 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 13240 transitions. [2021-06-12 21:03:53,878 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 13240 transitions. Word has length 51 [2021-06-12 21:03:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:53,878 INFO L482 AbstractCegarLoop]: Abstraction has 5433 states and 13240 transitions. [2021-06-12 21:03:53,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 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) [2021-06-12 21:03:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 13240 transitions. [2021-06-12 21:03:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:03:53,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:53,882 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:54,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 21:03:54,085 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 65 times [2021-06-12 21:03:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:54,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57800271] [2021-06-12 21:03:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:54,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:54,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57800271] [2021-06-12 21:03:54,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57800271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:54,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131409138] [2021-06-12 21:03:54,363 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 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 [2021-06-12 21:03:54,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 21:03:54,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:54,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:03:54,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:55,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131409138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:55,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:55,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-12 21:03:55,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566865057] [2021-06-12 21:03:55,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:03:55,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:55,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:03:55,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:03:55,023 INFO L87 Difference]: Start difference. First operand 5433 states and 13240 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:03:58,250 INFO L93 Difference]: Finished difference Result 7094 states and 16636 transitions. [2021-06-12 21:03:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 21:03:58,251 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:03:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:03:58,257 INFO L225 Difference]: With dead ends: 7094 [2021-06-12 21:03:58,257 INFO L226 Difference]: Without dead ends: 7088 [2021-06-12 21:03:58,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2632.0ms TimeCoverageRelationStatistics Valid=1100, Invalid=12706, Unknown=0, NotChecked=0, Total=13806 [2021-06-12 21:03:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7088 states. [2021-06-12 21:03:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7088 to 5314. [2021-06-12 21:03:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5314 states, 5313 states have (on average 2.43553547901374) internal successors, (12940), 5313 states have internal predecessors, (12940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5314 states to 5314 states and 12940 transitions. [2021-06-12 21:03:58,308 INFO L78 Accepts]: Start accepts. Automaton has 5314 states and 12940 transitions. Word has length 51 [2021-06-12 21:03:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:03:58,308 INFO L482 AbstractCegarLoop]: Abstraction has 5314 states and 12940 transitions. [2021-06-12 21:03:58,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:03:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5314 states and 12940 transitions. [2021-06-12 21:03:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:03:58,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:03:58,312 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:03:58,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 21:03:58,517 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:03:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:03:58,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 66 times [2021-06-12 21:03:58,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:03:58,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604626962] [2021-06-12 21:03:58,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:03:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:03:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:58,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:03:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604626962] [2021-06-12 21:03:58,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604626962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:58,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823206369] [2021-06-12 21:03:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:03:58,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 21:03:58,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:03:58,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:03:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:03:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:03:59,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823206369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:03:59,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:03:59,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-06-12 21:03:59,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475992423] [2021-06-12 21:03:59,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:03:59,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:03:59,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:03:59,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:03:59,282 INFO L87 Difference]: Start difference. First operand 5314 states and 12940 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:03,491 INFO L93 Difference]: Finished difference Result 10585 states and 24178 transitions. [2021-06-12 21:04:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-12 21:04:03,491 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:03,500 INFO L225 Difference]: With dead ends: 10585 [2021-06-12 21:04:03,500 INFO L226 Difference]: Without dead ends: 10561 [2021-06-12 21:04:03,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 2893.4ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-06-12 21:04:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-12 21:04:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 5782. [2021-06-12 21:04:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 2.44075419477599) internal successors, (14110), 5781 states have internal predecessors, (14110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 14110 transitions. [2021-06-12 21:04:03,576 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 14110 transitions. Word has length 51 [2021-06-12 21:04:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:03,576 INFO L482 AbstractCegarLoop]: Abstraction has 5782 states and 14110 transitions. [2021-06-12 21:04:03,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 14110 transitions. [2021-06-12 21:04:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:03,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:03,595 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:03,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-12 21:04:03,810 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 67 times [2021-06-12 21:04:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:03,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855418944] [2021-06-12 21:04:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:03,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:03,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855418944] [2021-06-12 21:04:03,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855418944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:03,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775955710] [2021-06-12 21:04:03,964 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 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 [2021-06-12 21:04:03,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:04:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:04,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775955710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:04,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:04,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-06-12 21:04:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72808382] [2021-06-12 21:04:04,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:04:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:04:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:04:04,561 INFO L87 Difference]: Start difference. First operand 5782 states and 14110 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:08,227 INFO L93 Difference]: Finished difference Result 8201 states and 19178 transitions. [2021-06-12 21:04:08,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 21:04:08,229 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:08,236 INFO L225 Difference]: With dead ends: 8201 [2021-06-12 21:04:08,236 INFO L226 Difference]: Without dead ends: 8197 [2021-06-12 21:04:08,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 2532.0ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-06-12 21:04:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-06-12 21:04:08,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 5452. [2021-06-12 21:04:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 2.439185470555861) internal successors, (13296), 5451 states have internal predecessors, (13296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 13296 transitions. [2021-06-12 21:04:08,300 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 13296 transitions. Word has length 51 [2021-06-12 21:04:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:08,301 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 13296 transitions. [2021-06-12 21:04:08,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 13296 transitions. [2021-06-12 21:04:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:08,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:08,304 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:08,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:08,505 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 68 times [2021-06-12 21:04:08,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:08,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943373758] [2021-06-12 21:04:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:08,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:08,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943373758] [2021-06-12 21:04:08,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943373758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:08,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149294751] [2021-06-12 21:04:08,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:08,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:04:08,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:04:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:09,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149294751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:09,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:09,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-06-12 21:04:09,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641827292] [2021-06-12 21:04:09,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 21:04:09,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:09,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 21:04:09,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:04:09,272 INFO L87 Difference]: Start difference. First operand 5452 states and 13296 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:14,597 INFO L93 Difference]: Finished difference Result 12411 states and 28171 transitions. [2021-06-12 21:04:14,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-12 21:04:14,597 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:14,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:14,608 INFO L225 Difference]: With dead ends: 12411 [2021-06-12 21:04:14,608 INFO L226 Difference]: Without dead ends: 12363 [2021-06-12 21:04:14,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 3550.0ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-06-12 21:04:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12363 states. [2021-06-12 21:04:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12363 to 5448. [2021-06-12 21:04:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.4384064622728108) internal successors, (13282), 5447 states have internal predecessors, (13282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 13282 transitions. [2021-06-12 21:04:14,708 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 13282 transitions. Word has length 51 [2021-06-12 21:04:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:14,708 INFO L482 AbstractCegarLoop]: Abstraction has 5448 states and 13282 transitions. [2021-06-12 21:04:14,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 13282 transitions. [2021-06-12 21:04:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:14,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:14,712 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:14,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:14,912 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:14,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 69 times [2021-06-12 21:04:14,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:14,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345252739] [2021-06-12 21:04:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:15,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:15,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345252739] [2021-06-12 21:04:15,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345252739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:15,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849042606] [2021-06-12 21:04:15,084 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:15,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 21:04:15,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:04:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:15,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849042606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:15,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:15,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-12 21:04:15,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458564070] [2021-06-12 21:04:15,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:04:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:04:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:04:15,614 INFO L87 Difference]: Start difference. First operand 5448 states and 13282 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:21,069 INFO L93 Difference]: Finished difference Result 15077 states and 34147 transitions. [2021-06-12 21:04:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-12 21:04:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:21,083 INFO L225 Difference]: With dead ends: 15077 [2021-06-12 21:04:21,083 INFO L226 Difference]: Without dead ends: 14999 [2021-06-12 21:04:21,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 3826.2ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-06-12 21:04:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14999 states. [2021-06-12 21:04:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14999 to 5335. [2021-06-12 21:04:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 2.4401949756280463) internal successors, (13016), 5334 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 13016 transitions. [2021-06-12 21:04:21,166 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 13016 transitions. Word has length 51 [2021-06-12 21:04:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:21,166 INFO L482 AbstractCegarLoop]: Abstraction has 5335 states and 13016 transitions. [2021-06-12 21:04:21,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 13016 transitions. [2021-06-12 21:04:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:21,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:21,169 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:21,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 21:04:21,377 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 70 times [2021-06-12 21:04:21,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:21,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565697343] [2021-06-12 21:04:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:21,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:21,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565697343] [2021-06-12 21:04:21,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565697343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:21,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039965468] [2021-06-12 21:04:21,548 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 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 [2021-06-12 21:04:21,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:04:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:21,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 21:04:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:22,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039965468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:22,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:22,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-06-12 21:04:22,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366272962] [2021-06-12 21:04:22,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 21:04:22,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:22,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 21:04:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:04:22,083 INFO L87 Difference]: Start difference. First operand 5335 states and 13016 transitions. Second operand has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:26,377 INFO L93 Difference]: Finished difference Result 16843 states and 37762 transitions. [2021-06-12 21:04:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-12 21:04:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:26,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:26,393 INFO L225 Difference]: With dead ends: 16843 [2021-06-12 21:04:26,393 INFO L226 Difference]: Without dead ends: 16573 [2021-06-12 21:04:26,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10182 ImplicationChecksByTransitivity, 3284.2ms TimeCoverageRelationStatistics Valid=4084, Invalid=23972, Unknown=0, NotChecked=0, Total=28056 [2021-06-12 21:04:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16573 states. [2021-06-12 21:04:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16573 to 5289. [2021-06-12 21:04:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 5288 states have (on average 2.440998487140696) internal successors, (12908), 5288 states have internal predecessors, (12908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 12908 transitions. [2021-06-12 21:04:26,484 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 12908 transitions. Word has length 51 [2021-06-12 21:04:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:26,484 INFO L482 AbstractCegarLoop]: Abstraction has 5289 states and 12908 transitions. [2021-06-12 21:04:26,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.255813953488372) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 12908 transitions. [2021-06-12 21:04:26,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:26,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:26,488 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:26,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-12 21:04:26,688 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 71 times [2021-06-12 21:04:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:26,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821890543] [2021-06-12 21:04:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:26,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:26,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821890543] [2021-06-12 21:04:26,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821890543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:26,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051242407] [2021-06-12 21:04:26,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:26,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 21:04:26,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:26,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:04:26,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051242407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-06-12 21:04:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678933422] [2021-06-12 21:04:27,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 21:04:27,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 21:04:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:04:27,441 INFO L87 Difference]: Start difference. First operand 5289 states and 12908 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:31,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:31,041 INFO L93 Difference]: Finished difference Result 18875 states and 42539 transitions. [2021-06-12 21:04:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-12 21:04:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:31,059 INFO L225 Difference]: With dead ends: 18875 [2021-06-12 21:04:31,060 INFO L226 Difference]: Without dead ends: 18587 [2021-06-12 21:04:31,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 3006.1ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-06-12 21:04:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18587 states. [2021-06-12 21:04:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18587 to 5317. [2021-06-12 21:04:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5317 states, 5316 states have (on average 2.438675696012039) internal successors, (12964), 5316 states have internal predecessors, (12964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:31,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 12964 transitions. [2021-06-12 21:04:31,185 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 12964 transitions. Word has length 51 [2021-06-12 21:04:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:31,186 INFO L482 AbstractCegarLoop]: Abstraction has 5317 states and 12964 transitions. [2021-06-12 21:04:31,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:31,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 12964 transitions. [2021-06-12 21:04:31,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:31,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:31,189 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:31,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:31,389 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 72 times [2021-06-12 21:04:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:31,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411030442] [2021-06-12 21:04:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:31,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:31,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411030442] [2021-06-12 21:04:31,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411030442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:31,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947974781] [2021-06-12 21:04:31,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:31,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 21:04:31,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 21:04:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:32,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947974781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:32,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:32,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-06-12 21:04:32,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976112847] [2021-06-12 21:04:32,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:04:32,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:04:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:04:32,120 INFO L87 Difference]: Start difference. First operand 5317 states and 12964 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:35,924 INFO L93 Difference]: Finished difference Result 16588 states and 36726 transitions. [2021-06-12 21:04:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-06-12 21:04:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:35,939 INFO L225 Difference]: With dead ends: 16588 [2021-06-12 21:04:35,939 INFO L226 Difference]: Without dead ends: 16174 [2021-06-12 21:04:35,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12160 ImplicationChecksByTransitivity, 3279.4ms TimeCoverageRelationStatistics Valid=5931, Invalid=25575, Unknown=0, NotChecked=0, Total=31506 [2021-06-12 21:04:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16174 states. [2021-06-12 21:04:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16174 to 5337. [2021-06-12 21:04:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 2.437031484257871) internal successors, (13004), 5336 states have internal predecessors, (13004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 13004 transitions. [2021-06-12 21:04:36,026 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 13004 transitions. Word has length 51 [2021-06-12 21:04:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:36,027 INFO L482 AbstractCegarLoop]: Abstraction has 5337 states and 13004 transitions. [2021-06-12 21:04:36,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 13004 transitions. [2021-06-12 21:04:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-12 21:04:36,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:36,030 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:36,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:36,230 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 73 times [2021-06-12 21:04:36,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:36,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118666048] [2021-06-12 21:04:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:36,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118666048] [2021-06-12 21:04:36,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118666048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:36,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953486930] [2021-06-12 21:04:36,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:04:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:36,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953486930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:36,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:36,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-12 21:04:36,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411121532] [2021-06-12 21:04:36,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:04:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:04:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:04:36,993 INFO L87 Difference]: Start difference. First operand 5337 states and 13004 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:40,713 INFO L93 Difference]: Finished difference Result 16800 states and 38164 transitions. [2021-06-12 21:04:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-12 21:04:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-12 21:04:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:40,728 INFO L225 Difference]: With dead ends: 16800 [2021-06-12 21:04:40,728 INFO L226 Difference]: Without dead ends: 16146 [2021-06-12 21:04:40,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 3250.6ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-06-12 21:04:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16146 states. [2021-06-12 21:04:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16146 to 4803. [2021-06-12 21:04:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 2.4123281965847565) internal successors, (11584), 4802 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 11584 transitions. [2021-06-12 21:04:40,810 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 11584 transitions. Word has length 51 [2021-06-12 21:04:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:40,810 INFO L482 AbstractCegarLoop]: Abstraction has 4803 states and 11584 transitions. [2021-06-12 21:04:40,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 11584 transitions. [2021-06-12 21:04:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 21:04:40,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:40,813 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:41,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:41,013 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 74 times [2021-06-12 21:04:41,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:41,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980684271] [2021-06-12 21:04:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:41,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:41,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980684271] [2021-06-12 21:04:41,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980684271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:41,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704877880] [2021-06-12 21:04:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:04:41,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:04:41,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 21:04:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:41,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704877880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:41,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:41,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-06-12 21:04:41,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256077430] [2021-06-12 21:04:41,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 21:04:41,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 21:04:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:04:41,810 INFO L87 Difference]: Start difference. First operand 4803 states and 11584 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:45,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:45,980 INFO L93 Difference]: Finished difference Result 6738 states and 15323 transitions. [2021-06-12 21:04:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-12 21:04:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-12 21:04:45,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:45,986 INFO L225 Difference]: With dead ends: 6738 [2021-06-12 21:04:45,986 INFO L226 Difference]: Without dead ends: 6426 [2021-06-12 21:04:45,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 3784.9ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-06-12 21:04:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-06-12 21:04:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 4802. [2021-06-12 21:04:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409289731305978) internal successors, (11567), 4801 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11567 transitions. [2021-06-12 21:04:46,031 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11567 transitions. Word has length 53 [2021-06-12 21:04:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:46,031 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11567 transitions. [2021-06-12 21:04:46,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11567 transitions. [2021-06-12 21:04:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 21:04:46,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:46,034 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:46,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:46,250 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 75 times [2021-06-12 21:04:46,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:46,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115750449] [2021-06-12 21:04:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115750449] [2021-06-12 21:04:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115750449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349729654] [2021-06-12 21:04:46,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:46,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 21:04:46,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 21:04:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:46,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349729654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:46,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:46,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-06-12 21:04:46,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476657093] [2021-06-12 21:04:46,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 21:04:46,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 21:04:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:04:46,938 INFO L87 Difference]: Start difference. First operand 4802 states and 11567 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:53,974 INFO L93 Difference]: Finished difference Result 6316 states and 14547 transitions. [2021-06-12 21:04:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-12 21:04:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-12 21:04:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:53,980 INFO L225 Difference]: With dead ends: 6316 [2021-06-12 21:04:53,980 INFO L226 Difference]: Without dead ends: 6312 [2021-06-12 21:04:53,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 6669.2ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-06-12 21:04:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6312 states. [2021-06-12 21:04:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6312 to 4802. [2021-06-12 21:04:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4801 states have (on average 2.409081441366382) internal successors, (11566), 4801 states have internal predecessors, (11566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 11566 transitions. [2021-06-12 21:04:54,049 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 11566 transitions. Word has length 53 [2021-06-12 21:04:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:54,050 INFO L482 AbstractCegarLoop]: Abstraction has 4802 states and 11566 transitions. [2021-06-12 21:04:54,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 11566 transitions. [2021-06-12 21:04:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:04:54,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:54,053 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:54,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:54,253 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:54,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 76 times [2021-06-12 21:04:54,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:54,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803009320] [2021-06-12 21:04:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:54,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:54,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803009320] [2021-06-12 21:04:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803009320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:54,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436031405] [2021-06-12 21:04:54,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:54,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:04:54,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:04:54,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:54,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436031405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:54,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:54,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 21:04:54,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935310332] [2021-06-12 21:04:54,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:04:54,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:04:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:04:54,484 INFO L87 Difference]: Start difference. First operand 4802 states and 11566 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2021-06-12 21:04:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:04:54,614 INFO L93 Difference]: Finished difference Result 6109 states and 14541 transitions. [2021-06-12 21:04:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:04:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 55 [2021-06-12 21:04:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:04:54,619 INFO L225 Difference]: With dead ends: 6109 [2021-06-12 21:04:54,619 INFO L226 Difference]: Without dead ends: 6034 [2021-06-12 21:04:54,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:04:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6034 states. [2021-06-12 21:04:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6034 to 5577. [2021-06-12 21:04:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5577 states, 5576 states have (on average 2.438307030129125) internal successors, (13596), 5576 states have internal predecessors, (13596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:04:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5577 states to 5577 states and 13596 transitions. [2021-06-12 21:04:54,682 INFO L78 Accepts]: Start accepts. Automaton has 5577 states and 13596 transitions. Word has length 55 [2021-06-12 21:04:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:04:54,682 INFO L482 AbstractCegarLoop]: Abstraction has 5577 states and 13596 transitions. [2021-06-12 21:04:54,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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) [2021-06-12 21:04:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5577 states and 13596 transitions. [2021-06-12 21:04:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:04:54,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:04:54,686 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:04:54,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:54,887 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:04:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:04:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 77 times [2021-06-12 21:04:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:04:54,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878245676] [2021-06-12 21:04:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:04:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:04:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:55,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:04:55,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878245676] [2021-06-12 21:04:55,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878245676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:55,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447415721] [2021-06-12 21:04:55,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:04:55,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 21:04:55,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:04:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 21:04:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:04:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:04:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447415721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:04:55,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:04:55,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-12 21:04:55,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30896830] [2021-06-12 21:04:55,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 21:04:55,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:04:55,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 21:04:55,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:04:55,982 INFO L87 Difference]: Start difference. First operand 5577 states and 13596 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:00,055 INFO L93 Difference]: Finished difference Result 7325 states and 17131 transitions. [2021-06-12 21:05:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 21:05:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:00,061 INFO L225 Difference]: With dead ends: 7325 [2021-06-12 21:05:00,061 INFO L226 Difference]: Without dead ends: 7319 [2021-06-12 21:05:00,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 3059.2ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-06-12 21:05:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-06-12 21:05:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 5539. [2021-06-12 21:05:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5539 states, 5538 states have (on average 2.438605994944023) internal successors, (13505), 5538 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:00,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5539 states to 5539 states and 13505 transitions. [2021-06-12 21:05:00,112 INFO L78 Accepts]: Start accepts. Automaton has 5539 states and 13505 transitions. Word has length 55 [2021-06-12 21:05:00,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:00,112 INFO L482 AbstractCegarLoop]: Abstraction has 5539 states and 13505 transitions. [2021-06-12 21:05:00,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:00,112 INFO L276 IsEmpty]: Start isEmpty. Operand 5539 states and 13505 transitions. [2021-06-12 21:05:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:00,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:00,115 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:00,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-12 21:05:00,316 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 78 times [2021-06-12 21:05:00,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:00,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141199157] [2021-06-12 21:05:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:00,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:00,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141199157] [2021-06-12 21:05:00,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141199157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:00,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611836278] [2021-06-12 21:05:00,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:00,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 21:05:00,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:00,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:05:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:01,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611836278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:01,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:01,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-06-12 21:05:01,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732713770] [2021-06-12 21:05:01,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 21:05:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:01,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 21:05:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:05:01,137 INFO L87 Difference]: Start difference. First operand 5539 states and 13505 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:06,738 INFO L93 Difference]: Finished difference Result 10773 states and 24488 transitions. [2021-06-12 21:05:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-12 21:05:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:06,747 INFO L225 Difference]: With dead ends: 10773 [2021-06-12 21:05:06,748 INFO L226 Difference]: Without dead ends: 10749 [2021-06-12 21:05:06,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 3591.6ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-06-12 21:05:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-06-12 21:05:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 5893. [2021-06-12 21:05:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 2.4414460285132384) internal successors, (14385), 5892 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 14385 transitions. [2021-06-12 21:05:06,819 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 14385 transitions. Word has length 55 [2021-06-12 21:05:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:06,820 INFO L482 AbstractCegarLoop]: Abstraction has 5893 states and 14385 transitions. [2021-06-12 21:05:06,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 14385 transitions. [2021-06-12 21:05:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:06,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:06,823 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:07,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:07,024 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:07,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 79 times [2021-06-12 21:05:07,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:07,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610770360] [2021-06-12 21:05:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:07,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:07,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610770360] [2021-06-12 21:05:07,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610770360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:07,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951157112] [2021-06-12 21:05:07,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:07,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:05:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951157112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:07,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:07,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-06-12 21:05:07,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946067264] [2021-06-12 21:05:07,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:05:07,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:07,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:05:07,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:05:07,912 INFO L87 Difference]: Start difference. First operand 5893 states and 14385 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:12,524 INFO L93 Difference]: Finished difference Result 8165 states and 19006 transitions. [2021-06-12 21:05:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 21:05:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:12,532 INFO L225 Difference]: With dead ends: 8165 [2021-06-12 21:05:12,532 INFO L226 Difference]: Without dead ends: 8161 [2021-06-12 21:05:12,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 3033.4ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-06-12 21:05:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-06-12 21:05:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 5628. [2021-06-12 21:05:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5627 states have (on average 2.438955038208637) internal successors, (13724), 5627 states have internal predecessors, (13724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 13724 transitions. [2021-06-12 21:05:12,604 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 13724 transitions. Word has length 55 [2021-06-12 21:05:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:12,604 INFO L482 AbstractCegarLoop]: Abstraction has 5628 states and 13724 transitions. [2021-06-12 21:05:12,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 13724 transitions. [2021-06-12 21:05:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:12,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:12,608 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:12,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:12,808 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 80 times [2021-06-12 21:05:12,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:12,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819751982] [2021-06-12 21:05:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:12,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:12,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819751982] [2021-06-12 21:05:12,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819751982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:12,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836300975] [2021-06-12 21:05:12,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:13,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:05:13,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:13,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:05:13,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:13,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836300975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:13,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:13,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-06-12 21:05:13,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021654076] [2021-06-12 21:05:13,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-12 21:05:13,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:13,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-12 21:05:13,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:05:13,665 INFO L87 Difference]: Start difference. First operand 5628 states and 13724 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:21,308 INFO L93 Difference]: Finished difference Result 12946 states and 29248 transitions. [2021-06-12 21:05:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-12 21:05:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:21,324 INFO L225 Difference]: With dead ends: 12946 [2021-06-12 21:05:21,324 INFO L226 Difference]: Without dead ends: 12898 [2021-06-12 21:05:21,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 4489.7ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-06-12 21:05:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2021-06-12 21:05:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 5600. [2021-06-12 21:05:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5600 states, 5599 states have (on average 2.4365065190212536) internal successors, (13642), 5599 states have internal predecessors, (13642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5600 states to 5600 states and 13642 transitions. [2021-06-12 21:05:21,404 INFO L78 Accepts]: Start accepts. Automaton has 5600 states and 13642 transitions. Word has length 55 [2021-06-12 21:05:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:21,404 INFO L482 AbstractCegarLoop]: Abstraction has 5600 states and 13642 transitions. [2021-06-12 21:05:21,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5600 states and 13642 transitions. [2021-06-12 21:05:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:21,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:21,407 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:21,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 21:05:21,608 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:21,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:21,608 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 81 times [2021-06-12 21:05:21,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:21,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108633430] [2021-06-12 21:05:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:21,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108633430] [2021-06-12 21:05:21,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108633430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:21,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778433140] [2021-06-12 21:05:21,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:21,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 21:05:21,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:05:21,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778433140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:22,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:22,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 44 [2021-06-12 21:05:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579439534] [2021-06-12 21:05:22,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 21:05:22,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 21:05:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:05:22,465 INFO L87 Difference]: Start difference. First operand 5600 states and 13642 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:29,292 INFO L93 Difference]: Finished difference Result 14970 states and 33594 transitions. [2021-06-12 21:05:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-12 21:05:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:29,306 INFO L225 Difference]: With dead ends: 14970 [2021-06-12 21:05:29,306 INFO L226 Difference]: Without dead ends: 14892 [2021-06-12 21:05:29,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16664 ImplicationChecksByTransitivity, 4869.9ms TimeCoverageRelationStatistics Valid=5098, Invalid=40058, Unknown=0, NotChecked=0, Total=45156 [2021-06-12 21:05:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14892 states. [2021-06-12 21:05:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14892 to 5524. [2021-06-12 21:05:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4349085641861308) internal successors, (13448), 5523 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13448 transitions. [2021-06-12 21:05:29,393 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13448 transitions. Word has length 55 [2021-06-12 21:05:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:29,393 INFO L482 AbstractCegarLoop]: Abstraction has 5524 states and 13448 transitions. [2021-06-12 21:05:29,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13448 transitions. [2021-06-12 21:05:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:29,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:29,396 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:29,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:29,597 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 82 times [2021-06-12 21:05:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:29,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099365990] [2021-06-12 21:05:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:29,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:29,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099365990] [2021-06-12 21:05:29,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099365990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:29,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528530209] [2021-06-12 21:05:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:29,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:05:29,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:05:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:30,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528530209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:30,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:30,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-06-12 21:05:30,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906337932] [2021-06-12 21:05:30,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:05:30,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:30,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:05:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1833, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:05:30,430 INFO L87 Difference]: Start difference. First operand 5524 states and 13448 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:36,500 INFO L93 Difference]: Finished difference Result 18186 states and 40794 transitions. [2021-06-12 21:05:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-12 21:05:36,501 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:36,519 INFO L225 Difference]: With dead ends: 18186 [2021-06-12 21:05:36,519 INFO L226 Difference]: Without dead ends: 18072 [2021-06-12 21:05:36,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15389 ImplicationChecksByTransitivity, 4549.6ms TimeCoverageRelationStatistics Valid=5445, Invalid=35967, Unknown=0, NotChecked=0, Total=41412 [2021-06-12 21:05:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18072 states. [2021-06-12 21:05:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18072 to 5412. [2021-06-12 21:05:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.4405839955645905) internal successors, (13206), 5411 states have internal predecessors, (13206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 13206 transitions. [2021-06-12 21:05:36,629 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 13206 transitions. Word has length 55 [2021-06-12 21:05:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:36,629 INFO L482 AbstractCegarLoop]: Abstraction has 5412 states and 13206 transitions. [2021-06-12 21:05:36,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 13206 transitions. [2021-06-12 21:05:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:36,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:36,632 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:36,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 21:05:36,834 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 83 times [2021-06-12 21:05:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:36,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332651669] [2021-06-12 21:05:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:37,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:37,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332651669] [2021-06-12 21:05:37,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332651669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:37,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275677085] [2021-06-12 21:05:37,048 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 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 [2021-06-12 21:05:37,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 21:05:37,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:05:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:37,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275677085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:37,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:37,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2021-06-12 21:05:37,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444919134] [2021-06-12 21:05:37,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 21:05:37,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 21:05:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:05:37,654 INFO L87 Difference]: Start difference. First operand 5412 states and 13206 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:41,934 INFO L93 Difference]: Finished difference Result 19113 states and 42468 transitions. [2021-06-12 21:05:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-12 21:05:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:41,954 INFO L225 Difference]: With dead ends: 19113 [2021-06-12 21:05:41,954 INFO L226 Difference]: Without dead ends: 18873 [2021-06-12 21:05:41,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 3450.9ms TimeCoverageRelationStatistics Valid=4545, Invalid=24867, Unknown=0, NotChecked=0, Total=29412 [2021-06-12 21:05:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2021-06-12 21:05:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 5360. [2021-06-12 21:05:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5360 states, 5359 states have (on average 2.4448591155066244) internal successors, (13102), 5359 states have internal predecessors, (13102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5360 states to 5360 states and 13102 transitions. [2021-06-12 21:05:42,066 INFO L78 Accepts]: Start accepts. Automaton has 5360 states and 13102 transitions. Word has length 55 [2021-06-12 21:05:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:42,066 INFO L482 AbstractCegarLoop]: Abstraction has 5360 states and 13102 transitions. [2021-06-12 21:05:42,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5360 states and 13102 transitions. [2021-06-12 21:05:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:42,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:42,070 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:42,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-12 21:05:42,271 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:42,271 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 84 times [2021-06-12 21:05:42,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:42,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312306473] [2021-06-12 21:05:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:42,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:42,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312306473] [2021-06-12 21:05:42,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312306473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:42,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26696435] [2021-06-12 21:05:42,499 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 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 [2021-06-12 21:05:42,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 21:05:42,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:42,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:05:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:43,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26696435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:43,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:43,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2021-06-12 21:05:43,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421321228] [2021-06-12 21:05:43,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-12 21:05:43,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-12 21:05:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:05:43,111 INFO L87 Difference]: Start difference. First operand 5360 states and 13102 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:47,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:47,546 INFO L93 Difference]: Finished difference Result 18758 states and 41177 transitions. [2021-06-12 21:05:47,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-12 21:05:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:47,564 INFO L225 Difference]: With dead ends: 18758 [2021-06-12 21:05:47,564 INFO L226 Difference]: Without dead ends: 18353 [2021-06-12 21:05:47,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14275 ImplicationChecksByTransitivity, 3765.8ms TimeCoverageRelationStatistics Valid=6292, Invalid=30380, Unknown=0, NotChecked=0, Total=36672 [2021-06-12 21:05:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-06-12 21:05:47,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5380. [2021-06-12 21:05:47,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 5379 states have (on average 2.443205056701989) internal successors, (13142), 5379 states have internal predecessors, (13142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 13142 transitions. [2021-06-12 21:05:47,662 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 13142 transitions. Word has length 55 [2021-06-12 21:05:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 5380 states and 13142 transitions. [2021-06-12 21:05:47,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 13142 transitions. [2021-06-12 21:05:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:47,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:47,665 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:47,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-12 21:05:47,865 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 85 times [2021-06-12 21:05:47,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:47,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090123399] [2021-06-12 21:05:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:48,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:48,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090123399] [2021-06-12 21:05:48,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090123399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:48,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780390810] [2021-06-12 21:05:48,090 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 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 [2021-06-12 21:05:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:05:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:48,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780390810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:48,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:48,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-06-12 21:05:48,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415921030] [2021-06-12 21:05:48,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-12 21:05:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-12 21:05:48,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:05:48,713 INFO L87 Difference]: Start difference. First operand 5380 states and 13142 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:53,149 INFO L93 Difference]: Finished difference Result 18854 states and 41231 transitions. [2021-06-12 21:05:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-12 21:05:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:53,163 INFO L225 Difference]: With dead ends: 18854 [2021-06-12 21:05:53,164 INFO L226 Difference]: Without dead ends: 18251 [2021-06-12 21:05:53,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 3816.2ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-06-12 21:05:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18251 states. [2021-06-12 21:05:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18251 to 5392. [2021-06-12 21:05:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5391 states have (on average 2.4422185123353737) internal successors, (13166), 5391 states have internal predecessors, (13166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:53,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 13166 transitions. [2021-06-12 21:05:53,257 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 13166 transitions. Word has length 55 [2021-06-12 21:05:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:53,257 INFO L482 AbstractCegarLoop]: Abstraction has 5392 states and 13166 transitions. [2021-06-12 21:05:53,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 13166 transitions. [2021-06-12 21:05:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:53,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:53,260 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:53,461 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 86 times [2021-06-12 21:05:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:53,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686932843] [2021-06-12 21:05:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:53,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:53,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686932843] [2021-06-12 21:05:53,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686932843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:53,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173581701] [2021-06-12 21:05:53,695 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 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 [2021-06-12 21:05:53,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:05:53,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:05:53,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:54,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173581701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:54,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:54,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-12 21:05:54,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162580989] [2021-06-12 21:05:54,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 21:05:54,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:54,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 21:05:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:05:54,291 INFO L87 Difference]: Start difference. First operand 5392 states and 13166 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:05:58,820 INFO L93 Difference]: Finished difference Result 15764 states and 34786 transitions. [2021-06-12 21:05:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-12 21:05:58,820 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:05:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:05:58,834 INFO L225 Difference]: With dead ends: 15764 [2021-06-12 21:05:58,834 INFO L226 Difference]: Without dead ends: 14963 [2021-06-12 21:05:58,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 3915.1ms TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-06-12 21:05:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14963 states. [2021-06-12 21:05:58,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14963 to 5551. [2021-06-12 21:05:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 2.4086486486486485) internal successors, (13368), 5550 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 13368 transitions. [2021-06-12 21:05:58,959 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 13368 transitions. Word has length 55 [2021-06-12 21:05:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:05:58,959 INFO L482 AbstractCegarLoop]: Abstraction has 5551 states and 13368 transitions. [2021-06-12 21:05:58,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:05:58,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 13368 transitions. [2021-06-12 21:05:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-12 21:05:58,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:05:58,962 INFO L472 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:05:59,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-12 21:05:59,163 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:05:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:05:59,163 INFO L82 PathProgramCache]: Analyzing trace with hash 335036743, now seen corresponding path program 87 times [2021-06-12 21:05:59,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:05:59,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903387306] [2021-06-12 21:05:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:05:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:05:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:59,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:05:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903387306] [2021-06-12 21:05:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903387306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382812035] [2021-06-12 21:05:59,287 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:05:59,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 21:05:59,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:05:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 21:05:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:05:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:05:59,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382812035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:05:59,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:05:59,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-06-12 21:05:59,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182513465] [2021-06-12 21:05:59,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-12 21:05:59,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:05:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-12 21:05:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:05:59,873 INFO L87 Difference]: Start difference. First operand 5551 states and 13368 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:07,222 INFO L93 Difference]: Finished difference Result 11259 states and 25238 transitions. [2021-06-12 21:06:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-12 21:06:07,223 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-12 21:06:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:07,231 INFO L225 Difference]: With dead ends: 11259 [2021-06-12 21:06:07,231 INFO L226 Difference]: Without dead ends: 11255 [2021-06-12 21:06:07,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 6681.7ms TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-06-12 21:06:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2021-06-12 21:06:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 5626. [2021-06-12 21:06:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 5625 states have (on average 2.4208) internal successors, (13617), 5625 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 13617 transitions. [2021-06-12 21:06:07,308 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 13617 transitions. Word has length 55 [2021-06-12 21:06:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:07,308 INFO L482 AbstractCegarLoop]: Abstraction has 5626 states and 13617 transitions. [2021-06-12 21:06:07,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 13617 transitions. [2021-06-12 21:06:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 21:06:07,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:07,312 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:07,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-12 21:06:07,513 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash 317372549, now seen corresponding path program 88 times [2021-06-12 21:06:07,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:07,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333448014] [2021-06-12 21:06:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:07,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333448014] [2021-06-12 21:06:07,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333448014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:07,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412140755] [2021-06-12 21:06:07,766 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 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 [2021-06-12 21:06:07,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:06:07,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 21:06:07,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:08,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412140755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:08,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:08,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-06-12 21:06:08,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828381723] [2021-06-12 21:06:08,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-12 21:06:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-12 21:06:08,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:06:08,438 INFO L87 Difference]: Start difference. First operand 5626 states and 13617 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:13,650 INFO L93 Difference]: Finished difference Result 7916 states and 18052 transitions. [2021-06-12 21:06:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2021-06-12 21:06:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 21:06:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:13,656 INFO L225 Difference]: With dead ends: 7916 [2021-06-12 21:06:13,656 INFO L226 Difference]: Without dead ends: 7538 [2021-06-12 21:06:13,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18266 ImplicationChecksByTransitivity, 4744.5ms TimeCoverageRelationStatistics Valid=12509, Invalid=34797, Unknown=0, NotChecked=0, Total=47306 [2021-06-12 21:06:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-12 21:06:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 5623. [2021-06-12 21:06:13,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.418000711490573) internal successors, (13594), 5622 states have internal predecessors, (13594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13594 transitions. [2021-06-12 21:06:13,721 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13594 transitions. Word has length 57 [2021-06-12 21:06:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:13,721 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13594 transitions. [2021-06-12 21:06:13,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13594 transitions. [2021-06-12 21:06:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 21:06:13,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:13,725 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:13,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:06:13,925 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1117608869, now seen corresponding path program 89 times [2021-06-12 21:06:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:13,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351350405] [2021-06-12 21:06:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:14,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:14,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351350405] [2021-06-12 21:06:14,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351350405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:14,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804350125] [2021-06-12 21:06:14,041 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 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 [2021-06-12 21:06:14,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 21:06:14,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:14,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:06:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:14,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804350125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:14,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:14,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26] total 39 [2021-06-12 21:06:14,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14891538] [2021-06-12 21:06:14,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:06:14,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:14,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:06:14,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:06:14,693 INFO L87 Difference]: Start difference. First operand 5623 states and 13594 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:23,153 INFO L93 Difference]: Finished difference Result 7450 states and 17196 transitions. [2021-06-12 21:06:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-06-12 21:06:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-12 21:06:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:23,159 INFO L225 Difference]: With dead ends: 7450 [2021-06-12 21:06:23,159 INFO L226 Difference]: Without dead ends: 7446 [2021-06-12 21:06:23,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46028 ImplicationChecksByTransitivity, 7933.6ms TimeCoverageRelationStatistics Valid=21517, Invalid=78023, Unknown=0, NotChecked=0, Total=99540 [2021-06-12 21:06:23,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7446 states. [2021-06-12 21:06:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7446 to 5623. [2021-06-12 21:06:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5623 states, 5622 states have (on average 2.4178228388473855) internal successors, (13593), 5622 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5623 states to 5623 states and 13593 transitions. [2021-06-12 21:06:23,217 INFO L78 Accepts]: Start accepts. Automaton has 5623 states and 13593 transitions. Word has length 57 [2021-06-12 21:06:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:23,217 INFO L482 AbstractCegarLoop]: Abstraction has 5623 states and 13593 transitions. [2021-06-12 21:06:23,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:23,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5623 states and 13593 transitions. [2021-06-12 21:06:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:06:23,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:23,221 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:23,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:06:23,421 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash -870344253, now seen corresponding path program 90 times [2021-06-12 21:06:23,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:23,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888789752] [2021-06-12 21:06:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 1 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:23,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:23,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888789752] [2021-06-12 21:06:23,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888789752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:23,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061350340] [2021-06-12 21:06:23,571 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 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 [2021-06-12 21:06:23,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 21:06:23,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:23,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 21:06:23,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 64 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061350340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:23,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:23,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 25 [2021-06-12 21:06:23,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082679156] [2021-06-12 21:06:23,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:06:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:06:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:06:23,848 INFO L87 Difference]: Start difference. First operand 5623 states and 13593 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:24,089 INFO L93 Difference]: Finished difference Result 7171 states and 17073 transitions. [2021-06-12 21:06:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:06:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:06:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:24,096 INFO L225 Difference]: With dead ends: 7171 [2021-06-12 21:06:24,096 INFO L226 Difference]: Without dead ends: 7081 [2021-06-12 21:06:24,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:06:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-06-12 21:06:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6483. [2021-06-12 21:06:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 2.4438444924406046) internal successors, (15841), 6482 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 15841 transitions. [2021-06-12 21:06:24,165 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 15841 transitions. Word has length 59 [2021-06-12 21:06:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:24,165 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 15841 transitions. [2021-06-12 21:06:24,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 15841 transitions. [2021-06-12 21:06:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:06:24,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:24,169 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:24,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:06:24,370 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1705145369, now seen corresponding path program 91 times [2021-06-12 21:06:24,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:24,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547273067] [2021-06-12 21:06:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:24,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:24,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547273067] [2021-06-12 21:06:24,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547273067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:24,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722965730] [2021-06-12 21:06:24,581 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 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 [2021-06-12 21:06:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:24,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-12 21:06:24,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:25,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722965730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:25,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:25,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 45 [2021-06-12 21:06:25,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206556379] [2021-06-12 21:06:25,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:06:25,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:06:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1866, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:06:25,342 INFO L87 Difference]: Start difference. First operand 6483 states and 15841 transitions. Second operand has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:31,481 INFO L93 Difference]: Finished difference Result 12343 states and 28098 transitions. [2021-06-12 21:06:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-12 21:06:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:06:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:31,491 INFO L225 Difference]: With dead ends: 12343 [2021-06-12 21:06:31,491 INFO L226 Difference]: Without dead ends: 12319 [2021-06-12 21:06:31,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10309 ImplicationChecksByTransitivity, 4027.6ms TimeCoverageRelationStatistics Valid=2449, Invalid=28351, Unknown=0, NotChecked=0, Total=30800 [2021-06-12 21:06:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2021-06-12 21:06:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 6755. [2021-06-12 21:06:31,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.447290494521765) internal successors, (16529), 6754 states have internal predecessors, (16529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 16529 transitions. [2021-06-12 21:06:31,576 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 16529 transitions. Word has length 59 [2021-06-12 21:06:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:31,576 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 16529 transitions. [2021-06-12 21:06:31,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.4565217391304346) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 16529 transitions. [2021-06-12 21:06:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:06:31,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:31,580 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:31,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 21:06:31,781 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 974779459, now seen corresponding path program 92 times [2021-06-12 21:06:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:31,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536433775] [2021-06-12 21:06:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:31,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:31,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536433775] [2021-06-12 21:06:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536433775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:31,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178294540] [2021-06-12 21:06:31,972 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 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 [2021-06-12 21:06:32,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:06:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-12 21:06:32,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:32,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178294540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:32,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:32,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28] total 44 [2021-06-12 21:06:32,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682777114] [2021-06-12 21:06:32,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-12 21:06:32,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-12 21:06:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:06:32,770 INFO L87 Difference]: Start difference. First operand 6755 states and 16529 transitions. Second operand has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:37,824 INFO L93 Difference]: Finished difference Result 9269 states and 21605 transitions. [2021-06-12 21:06:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-12 21:06:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:06:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:37,831 INFO L225 Difference]: With dead ends: 9269 [2021-06-12 21:06:37,831 INFO L226 Difference]: Without dead ends: 9265 [2021-06-12 21:06:37,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3412.5ms TimeCoverageRelationStatistics Valid=1733, Invalid=19147, Unknown=0, NotChecked=0, Total=20880 [2021-06-12 21:06:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-12 21:06:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 6473. [2021-06-12 21:06:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6473 states, 6472 states have (on average 2.4456118665018542) internal successors, (15828), 6472 states have internal predecessors, (15828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6473 states to 6473 states and 15828 transitions. [2021-06-12 21:06:37,900 INFO L78 Accepts]: Start accepts. Automaton has 6473 states and 15828 transitions. Word has length 59 [2021-06-12 21:06:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:37,900 INFO L482 AbstractCegarLoop]: Abstraction has 6473 states and 15828 transitions. [2021-06-12 21:06:37,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6473 states and 15828 transitions. [2021-06-12 21:06:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:06:37,904 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:37,904 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:38,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:06:38,105 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:38,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1018344093, now seen corresponding path program 93 times [2021-06-12 21:06:38,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:38,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095851488] [2021-06-12 21:06:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:38,314 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:38,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095851488] [2021-06-12 21:06:38,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095851488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:38,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217524280] [2021-06-12 21:06:38,315 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 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 [2021-06-12 21:06:38,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 21:06:38,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 21:06:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 2 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:39,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217524280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:39,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:39,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-06-12 21:06:39,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517496099] [2021-06-12 21:06:39,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-12 21:06:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-12 21:06:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:06:39,042 INFO L87 Difference]: Start difference. First operand 6473 states and 15828 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:47,550 INFO L93 Difference]: Finished difference Result 14464 states and 32612 transitions. [2021-06-12 21:06:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-12 21:06:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:06:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:47,563 INFO L225 Difference]: With dead ends: 14464 [2021-06-12 21:06:47,563 INFO L226 Difference]: Without dead ends: 14416 [2021-06-12 21:06:47,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17435 ImplicationChecksByTransitivity, 4991.5ms TimeCoverageRelationStatistics Valid=4375, Invalid=43805, Unknown=0, NotChecked=0, Total=48180 [2021-06-12 21:06:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14416 states. [2021-06-12 21:06:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14416 to 6523. [2021-06-12 21:06:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6523 states, 6522 states have (on average 2.4449555351119288) internal successors, (15946), 6522 states have internal predecessors, (15946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6523 states to 6523 states and 15946 transitions. [2021-06-12 21:06:47,656 INFO L78 Accepts]: Start accepts. Automaton has 6523 states and 15946 transitions. Word has length 59 [2021-06-12 21:06:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:47,656 INFO L482 AbstractCegarLoop]: Abstraction has 6523 states and 15946 transitions. [2021-06-12 21:06:47,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6523 states and 15946 transitions. [2021-06-12 21:06:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:06:47,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:47,660 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:47,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:06:47,860 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -194027999, now seen corresponding path program 94 times [2021-06-12 21:06:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:47,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537856760] [2021-06-12 21:06:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:48,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:48,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537856760] [2021-06-12 21:06:48,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537856760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:48,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590252553] [2021-06-12 21:06:48,079 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 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 [2021-06-12 21:06:48,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:06:48,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 21:06:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:48,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590252553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:48,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:48,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 47 [2021-06-12 21:06:48,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105734028] [2021-06-12 21:06:48,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 21:06:48,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 21:06:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:06:48,829 INFO L87 Difference]: Start difference. First operand 6523 states and 15946 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:06:56,943 INFO L93 Difference]: Finished difference Result 17210 states and 38597 transitions. [2021-06-12 21:06:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-06-12 21:06:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:06:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:06:56,959 INFO L225 Difference]: With dead ends: 17210 [2021-06-12 21:06:56,959 INFO L226 Difference]: Without dead ends: 17132 [2021-06-12 21:06:56,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22220 ImplicationChecksByTransitivity, 5884.5ms TimeCoverageRelationStatistics Valid=6045, Invalid=53247, Unknown=0, NotChecked=0, Total=59292 [2021-06-12 21:06:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17132 states. [2021-06-12 21:06:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17132 to 6424. [2021-06-12 21:06:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6424 states, 6423 states have (on average 2.4406040790907677) internal successors, (15676), 6423 states have internal predecessors, (15676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6424 states to 6424 states and 15676 transitions. [2021-06-12 21:06:57,063 INFO L78 Accepts]: Start accepts. Automaton has 6424 states and 15676 transitions. Word has length 59 [2021-06-12 21:06:57,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:06:57,064 INFO L482 AbstractCegarLoop]: Abstraction has 6424 states and 15676 transitions. [2021-06-12 21:06:57,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:06:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 6424 states and 15676 transitions. [2021-06-12 21:06:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:06:57,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:06:57,067 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:06:57,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:06:57,268 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:06:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:06:57,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1178744485, now seen corresponding path program 95 times [2021-06-12 21:06:57,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:06:57,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107950275] [2021-06-12 21:06:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:06:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:06:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:57,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:06:57,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107950275] [2021-06-12 21:06:57,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107950275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:57,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926239539] [2021-06-12 21:06:57,485 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 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 [2021-06-12 21:06:57,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 21:06:57,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:06:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 21:06:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:06:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 12 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:06:58,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926239539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:06:58,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:06:58,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28] total 49 [2021-06-12 21:06:58,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950192327] [2021-06-12 21:06:58,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 21:06:58,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:06:58,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 21:06:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:06:58,193 INFO L87 Difference]: Start difference. First operand 6424 states and 15676 transitions. Second operand has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:06,045 INFO L93 Difference]: Finished difference Result 19569 states and 43599 transitions. [2021-06-12 21:07:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-06-12 21:07:06,045 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:06,063 INFO L225 Difference]: With dead ends: 19569 [2021-06-12 21:07:06,063 INFO L226 Difference]: Without dead ends: 19455 [2021-06-12 21:07:06,065 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 5643.8ms TimeCoverageRelationStatistics Valid=7134, Invalid=52646, Unknown=0, NotChecked=0, Total=59780 [2021-06-12 21:07:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19455 states. [2021-06-12 21:07:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19455 to 6298. [2021-06-12 21:07:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6298 states, 6297 states have (on average 2.4427505161187866) internal successors, (15382), 6297 states have internal predecessors, (15382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6298 states to 6298 states and 15382 transitions. [2021-06-12 21:07:06,174 INFO L78 Accepts]: Start accepts. Automaton has 6298 states and 15382 transitions. Word has length 59 [2021-06-12 21:07:06,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:06,174 INFO L482 AbstractCegarLoop]: Abstraction has 6298 states and 15382 transitions. [2021-06-12 21:07:06,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.26) internal successors, (113), 49 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 6298 states and 15382 transitions. [2021-06-12 21:07:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:07:06,178 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:06,178 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:06,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:07:06,379 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:06,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:06,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1738865705, now seen corresponding path program 96 times [2021-06-12 21:07:06,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:06,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499195630] [2021-06-12 21:07:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:06,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:06,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499195630] [2021-06-12 21:07:06,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499195630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:06,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929468148] [2021-06-12 21:07:06,598 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 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 [2021-06-12 21:07:06,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 21:07:06,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:07:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-12 21:07:06,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 20 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:07,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929468148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:07,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:07,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 50 [2021-06-12 21:07:07,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045563571] [2021-06-12 21:07:07,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:07:07,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:07:07,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2259, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:07:07,366 INFO L87 Difference]: Start difference. First operand 6298 states and 15382 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:13,215 INFO L93 Difference]: Finished difference Result 22986 states and 51049 transitions. [2021-06-12 21:07:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-12 21:07:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:13,235 INFO L225 Difference]: With dead ends: 22986 [2021-06-12 21:07:13,235 INFO L226 Difference]: Without dead ends: 22683 [2021-06-12 21:07:13,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17310 ImplicationChecksByTransitivity, 4620.9ms TimeCoverageRelationStatistics Valid=6385, Invalid=38771, Unknown=0, NotChecked=0, Total=45156 [2021-06-12 21:07:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22683 states. [2021-06-12 21:07:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22683 to 5441. [2021-06-12 21:07:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 2.4193014705882354) internal successors, (13161), 5440 states have internal predecessors, (13161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 13161 transitions. [2021-06-12 21:07:13,353 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 13161 transitions. Word has length 59 [2021-06-12 21:07:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:13,353 INFO L482 AbstractCegarLoop]: Abstraction has 5441 states and 13161 transitions. [2021-06-12 21:07:13,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 13161 transitions. [2021-06-12 21:07:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:07:13,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:13,356 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:13,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable384 [2021-06-12 21:07:13,557 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2044629331, now seen corresponding path program 97 times [2021-06-12 21:07:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:13,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243961384] [2021-06-12 21:07:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:13,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:13,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243961384] [2021-06-12 21:07:13,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243961384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:13,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292805075] [2021-06-12 21:07:13,783 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 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 [2021-06-12 21:07:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:07:13,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 30 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:14,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292805075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:14,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:14,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-06-12 21:07:14,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443757037] [2021-06-12 21:07:14,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:07:14,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:07:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2250, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:07:14,461 INFO L87 Difference]: Start difference. First operand 5441 states and 13161 transitions. Second operand has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:19,459 INFO L93 Difference]: Finished difference Result 22758 states and 49665 transitions. [2021-06-12 21:07:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-12 21:07:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:19,480 INFO L225 Difference]: With dead ends: 22758 [2021-06-12 21:07:19,480 INFO L226 Difference]: Without dead ends: 22332 [2021-06-12 21:07:19,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14328 ImplicationChecksByTransitivity, 3970.6ms TimeCoverageRelationStatistics Valid=5883, Invalid=32337, Unknown=0, NotChecked=0, Total=38220 [2021-06-12 21:07:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22332 states. [2021-06-12 21:07:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22332 to 5465. [2021-06-12 21:07:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5465 states, 5464 states have (on average 2.417459736456808) internal successors, (13209), 5464 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5465 states to 5465 states and 13209 transitions. [2021-06-12 21:07:19,610 INFO L78 Accepts]: Start accepts. Automaton has 5465 states and 13209 transitions. Word has length 59 [2021-06-12 21:07:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:19,610 INFO L482 AbstractCegarLoop]: Abstraction has 5465 states and 13209 transitions. [2021-06-12 21:07:19,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.215686274509804) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5465 states and 13209 transitions. [2021-06-12 21:07:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:07:19,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:19,614 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:19,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:07:19,814 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1129401905, now seen corresponding path program 98 times [2021-06-12 21:07:19,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:19,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233561865] [2021-06-12 21:07:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:20,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:20,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233561865] [2021-06-12 21:07:20,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233561865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:20,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086013324] [2021-06-12 21:07:20,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:07:20,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:07:20,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:07:20,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:07:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 42 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086013324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:20,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:20,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2021-06-12 21:07:20,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268670704] [2021-06-12 21:07:20,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-12 21:07:20,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-12 21:07:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:07:20,731 INFO L87 Difference]: Start difference. First operand 5465 states and 13209 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:26,149 INFO L93 Difference]: Finished difference Result 22040 states and 47868 transitions. [2021-06-12 21:07:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-06-12 21:07:26,150 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:26,170 INFO L225 Difference]: With dead ends: 22040 [2021-06-12 21:07:26,170 INFO L226 Difference]: Without dead ends: 21506 [2021-06-12 21:07:26,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19899 ImplicationChecksByTransitivity, 4663.3ms TimeCoverageRelationStatistics Valid=8757, Invalid=41195, Unknown=0, NotChecked=0, Total=49952 [2021-06-12 21:07:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21506 states. [2021-06-12 21:07:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21506 to 5481. [2021-06-12 21:07:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5480 states have (on average 2.4162408759124085) internal successors, (13241), 5480 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 13241 transitions. [2021-06-12 21:07:26,286 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 13241 transitions. Word has length 59 [2021-06-12 21:07:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:26,286 INFO L482 AbstractCegarLoop]: Abstraction has 5481 states and 13241 transitions. [2021-06-12 21:07:26,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 13241 transitions. [2021-06-12 21:07:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:07:26,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:26,290 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:26,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:07:26,490 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:26,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:26,490 INFO L82 PathProgramCache]: Analyzing trace with hash 819878581, now seen corresponding path program 99 times [2021-06-12 21:07:26,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:26,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817827991] [2021-06-12 21:07:26,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:26,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:26,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817827991] [2021-06-12 21:07:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817827991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:26,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573545772] [2021-06-12 21:07:26,767 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 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 [2021-06-12 21:07:26,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 21:07:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:07:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:07:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 56 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573545772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:27,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:27,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 53 [2021-06-12 21:07:27,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166567652] [2021-06-12 21:07:27,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 21:07:27,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:27,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 21:07:27,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:07:27,498 INFO L87 Difference]: Start difference. First operand 5481 states and 13241 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:33,308 INFO L93 Difference]: Finished difference Result 19025 states and 40337 transitions. [2021-06-12 21:07:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-12 21:07:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:33,326 INFO L225 Difference]: With dead ends: 19025 [2021-06-12 21:07:33,326 INFO L226 Difference]: Without dead ends: 18353 [2021-06-12 21:07:33,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23147 ImplicationChecksByTransitivity, 5088.9ms TimeCoverageRelationStatistics Valid=11132, Invalid=46228, Unknown=0, NotChecked=0, Total=57360 [2021-06-12 21:07:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18353 states. [2021-06-12 21:07:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18353 to 5493. [2021-06-12 21:07:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5492 states have (on average 2.415331391114348) internal successors, (13265), 5492 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 13265 transitions. [2021-06-12 21:07:33,430 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 13265 transitions. Word has length 59 [2021-06-12 21:07:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:33,430 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 13265 transitions. [2021-06-12 21:07:33,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 13265 transitions. [2021-06-12 21:07:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:07:33,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:33,433 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:33,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 21:07:33,638 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1283609657, now seen corresponding path program 100 times [2021-06-12 21:07:33,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:33,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280165078] [2021-06-12 21:07:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:33,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280165078] [2021-06-12 21:07:33,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280165078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:33,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145158619] [2021-06-12 21:07:33,993 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 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 [2021-06-12 21:07:34,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:07:34,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:07:34,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:07:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 72 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:34,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145158619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:34,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:34,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-12 21:07:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324736562] [2021-06-12 21:07:34,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 21:07:34,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 21:07:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:07:34,688 INFO L87 Difference]: Start difference. First operand 5493 states and 13265 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:40,247 INFO L93 Difference]: Finished difference Result 17796 states and 38889 transitions. [2021-06-12 21:07:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-06-12 21:07:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:40,260 INFO L225 Difference]: With dead ends: 17796 [2021-06-12 21:07:40,260 INFO L226 Difference]: Without dead ends: 16833 [2021-06-12 21:07:40,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18178 ImplicationChecksByTransitivity, 5006.5ms TimeCoverageRelationStatistics Valid=10369, Invalid=38693, Unknown=0, NotChecked=0, Total=49062 [2021-06-12 21:07:40,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16833 states. [2021-06-12 21:07:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16833 to 5659. [2021-06-12 21:07:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.376458112407211) internal successors, (13446), 5658 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:40,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 13446 transitions. [2021-06-12 21:07:40,350 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 13446 transitions. Word has length 59 [2021-06-12 21:07:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:40,350 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 13446 transitions. [2021-06-12 21:07:40,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 13446 transitions. [2021-06-12 21:07:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 21:07:40,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:40,354 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:40,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-12 21:07:40,554 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:40,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash -994946229, now seen corresponding path program 101 times [2021-06-12 21:07:40,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:40,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575401658] [2021-06-12 21:07:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:40,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:40,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575401658] [2021-06-12 21:07:40,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575401658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:40,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34407693] [2021-06-12 21:07:40,696 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 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 [2021-06-12 21:07:40,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 21:07:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:07:40,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:07:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 102 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:41,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34407693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:41,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:41,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-06-12 21:07:41,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174523365] [2021-06-12 21:07:41,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-12 21:07:41,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:41,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-12 21:07:41,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:07:41,377 INFO L87 Difference]: Start difference. First operand 5659 states and 13446 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:50,277 INFO L93 Difference]: Finished difference Result 12575 states and 27866 transitions. [2021-06-12 21:07:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-06-12 21:07:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-12 21:07:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:50,287 INFO L225 Difference]: With dead ends: 12575 [2021-06-12 21:07:50,287 INFO L226 Difference]: Without dead ends: 12571 [2021-06-12 21:07:50,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46972 ImplicationChecksByTransitivity, 8198.5ms TimeCoverageRelationStatistics Valid=21531, Invalid=80549, Unknown=0, NotChecked=0, Total=102080 [2021-06-12 21:07:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12571 states. [2021-06-12 21:07:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12571 to 5767. [2021-06-12 21:07:50,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5767 states, 5766 states have (on average 2.392126257370794) internal successors, (13793), 5766 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5767 states to 5767 states and 13793 transitions. [2021-06-12 21:07:50,365 INFO L78 Accepts]: Start accepts. Automaton has 5767 states and 13793 transitions. Word has length 59 [2021-06-12 21:07:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:50,365 INFO L482 AbstractCegarLoop]: Abstraction has 5767 states and 13793 transitions. [2021-06-12 21:07:50,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 5767 states and 13793 transitions. [2021-06-12 21:07:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-12 21:07:50,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:50,393 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:50,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:07:50,593 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:50,594 INFO L82 PathProgramCache]: Analyzing trace with hash -192628671, now seen corresponding path program 102 times [2021-06-12 21:07:50,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:50,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861982592] [2021-06-12 21:07:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:50,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:50,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861982592] [2021-06-12 21:07:50,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861982592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:50,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663949313] [2021-06-12 21:07:50,876 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 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 [2021-06-12 21:07:50,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 21:07:50,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:07:50,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:07:50,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:51,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663949313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:51,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:51,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 55 [2021-06-12 21:07:51,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308563029] [2021-06-12 21:07:51,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-06-12 21:07:51,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:51,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-06-12 21:07:51,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2528, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:07:51,651 INFO L87 Difference]: Start difference. First operand 5767 states and 13793 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:07:57,878 INFO L93 Difference]: Finished difference Result 8440 states and 18980 transitions. [2021-06-12 21:07:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-12 21:07:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-12 21:07:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:07:57,885 INFO L225 Difference]: With dead ends: 8440 [2021-06-12 21:07:57,885 INFO L226 Difference]: Without dead ends: 7990 [2021-06-12 21:07:57,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24730 ImplicationChecksByTransitivity, 5650.2ms TimeCoverageRelationStatistics Valid=16440, Invalid=45312, Unknown=0, NotChecked=0, Total=61752 [2021-06-12 21:07:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-12 21:07:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 5762. [2021-06-12 21:07:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5762 states, 5761 states have (on average 2.389168547127235) internal successors, (13764), 5761 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) [2021-06-12 21:07:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5762 states to 5762 states and 13764 transitions. [2021-06-12 21:07:57,959 INFO L78 Accepts]: Start accepts. Automaton has 5762 states and 13764 transitions. Word has length 61 [2021-06-12 21:07:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:07:57,959 INFO L482 AbstractCegarLoop]: Abstraction has 5762 states and 13764 transitions. [2021-06-12 21:07:57,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:07:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 5762 states and 13764 transitions. [2021-06-12 21:07:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-12 21:07:57,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:07:57,962 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:07:58,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:07:58,163 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:07:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:07:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash 559420251, now seen corresponding path program 103 times [2021-06-12 21:07:58,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:07:58,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655658920] [2021-06-12 21:07:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:07:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:58,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:07:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655658920] [2021-06-12 21:07:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655658920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201780720] [2021-06-12 21:07:58,304 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 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 [2021-06-12 21:07:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:07:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:07:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:07:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:07:58,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201780720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:07:58,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:07:58,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28] total 42 [2021-06-12 21:07:58,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844579024] [2021-06-12 21:07:58,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-12 21:07:58,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:07:58,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-12 21:07:58,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1436, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:07:58,961 INFO L87 Difference]: Start difference. First operand 5762 states and 13764 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:04,586 INFO L93 Difference]: Finished difference Result 7544 states and 17272 transitions. [2021-06-12 21:08:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-12 21:08:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-12 21:08:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:04,592 INFO L225 Difference]: With dead ends: 7544 [2021-06-12 21:08:04,592 INFO L226 Difference]: Without dead ends: 7540 [2021-06-12 21:08:04,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23464 ImplicationChecksByTransitivity, 5387.4ms TimeCoverageRelationStatistics Valid=12941, Invalid=42519, Unknown=0, NotChecked=0, Total=55460 [2021-06-12 21:08:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7540 states. [2021-06-12 21:08:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7540 to 5718. [2021-06-12 21:08:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 2.391988805317474) internal successors, (13675), 5717 states have internal predecessors, (13675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 13675 transitions. [2021-06-12 21:08:04,650 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 13675 transitions. Word has length 61 [2021-06-12 21:08:04,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:04,650 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 13675 transitions. [2021-06-12 21:08:04,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 42 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:04,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 13675 transitions. [2021-06-12 21:08:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-12 21:08:04,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:04,653 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:04,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 21:08:04,854 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1867745943, now seen corresponding path program 104 times [2021-06-12 21:08:04,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:04,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957298811] [2021-06-12 21:08:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 100 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:08:04,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957298811] [2021-06-12 21:08:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957298811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435185510] [2021-06-12 21:08:04,991 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 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 [2021-06-12 21:08:05,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:08:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:08:05,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-12 21:08:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:05,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435185510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:05,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:05,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 43 [2021-06-12 21:08:05,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521742805] [2021-06-12 21:08:05,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-12 21:08:05,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:05,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-12 21:08:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:08:05,660 INFO L87 Difference]: Start difference. First operand 5718 states and 13675 transitions. Second operand has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:08,855 INFO L93 Difference]: Finished difference Result 12090 states and 27556 transitions. [2021-06-12 21:08:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-12 21:08:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-12 21:08:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:08,866 INFO L225 Difference]: With dead ends: 12090 [2021-06-12 21:08:08,866 INFO L226 Difference]: Without dead ends: 12081 [2021-06-12 21:08:08,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5212 ImplicationChecksByTransitivity, 2585.9ms TimeCoverageRelationStatistics Valid=2862, Invalid=14694, Unknown=0, NotChecked=0, Total=17556 [2021-06-12 21:08:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12081 states. [2021-06-12 21:08:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12081 to 7235. [2021-06-12 21:08:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.380702239424938) internal successors, (17222), 7234 states have internal predecessors, (17222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 17222 transitions. [2021-06-12 21:08:08,953 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 17222 transitions. Word has length 61 [2021-06-12 21:08:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:08,953 INFO L482 AbstractCegarLoop]: Abstraction has 7235 states and 17222 transitions. [2021-06-12 21:08:08,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.659090909090909) internal successors, (117), 43 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 17222 transitions. [2021-06-12 21:08:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:08:08,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:08,958 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:09,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-12 21:08:09,159 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:09,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:09,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1355244929, now seen corresponding path program 105 times [2021-06-12 21:08:09,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:09,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443135877] [2021-06-12 21:08:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:09,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:09,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443135877] [2021-06-12 21:08:09,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443135877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:09,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143722194] [2021-06-12 21:08:09,308 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 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 [2021-06-12 21:08:09,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 21:08:09,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:08:09,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:08:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 25 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:09,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143722194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:09,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:09,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 23 [2021-06-12 21:08:09,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691969007] [2021-06-12 21:08:09,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:08:09,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:09,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:08:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:08:09,543 INFO L87 Difference]: Start difference. First operand 7235 states and 17222 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:09,840 INFO L93 Difference]: Finished difference Result 9195 states and 21714 transitions. [2021-06-12 21:08:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:08:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:08:09,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:09,850 INFO L225 Difference]: With dead ends: 9195 [2021-06-12 21:08:09,850 INFO L226 Difference]: Without dead ends: 9102 [2021-06-12 21:08:09,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:08:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9102 states. [2021-06-12 21:08:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9102 to 8338. [2021-06-12 21:08:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 2.408900083963056) internal successors, (20083), 8337 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 20083 transitions. [2021-06-12 21:08:09,945 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 20083 transitions. Word has length 63 [2021-06-12 21:08:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:09,945 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 20083 transitions. [2021-06-12 21:08:09,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 20083 transitions. [2021-06-12 21:08:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:08:09,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:09,951 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:10,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:08:10,152 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2045530241, now seen corresponding path program 106 times [2021-06-12 21:08:10,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:10,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948406511] [2021-06-12 21:08:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:10,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:10,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948406511] [2021-06-12 21:08:10,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948406511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:10,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669436648] [2021-06-12 21:08:10,404 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 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 [2021-06-12 21:08:10,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:08:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:08:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-12 21:08:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:11,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669436648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:11,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:11,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30] total 47 [2021-06-12 21:08:11,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653073136] [2021-06-12 21:08:11,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 21:08:11,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 21:08:11,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2037, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:08:11,271 INFO L87 Difference]: Start difference. First operand 8338 states and 20083 transitions. Second operand has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:18,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:18,105 INFO L93 Difference]: Finished difference Result 11486 states and 26531 transitions. [2021-06-12 21:08:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-12 21:08:18,105 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:08:18,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:18,113 INFO L225 Difference]: With dead ends: 11486 [2021-06-12 21:08:18,113 INFO L226 Difference]: Without dead ends: 11482 [2021-06-12 21:08:18,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8732 ImplicationChecksByTransitivity, 4217.3ms TimeCoverageRelationStatistics Valid=2129, Invalid=25593, Unknown=0, NotChecked=0, Total=27722 [2021-06-12 21:08:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11482 states. [2021-06-12 21:08:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11482 to 8616. [2021-06-12 21:08:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8616 states, 8615 states have (on average 2.4174114915844456) internal successors, (20826), 8615 states have internal predecessors, (20826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8616 states to 8616 states and 20826 transitions. [2021-06-12 21:08:18,209 INFO L78 Accepts]: Start accepts. Automaton has 8616 states and 20826 transitions. Word has length 63 [2021-06-12 21:08:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:18,209 INFO L482 AbstractCegarLoop]: Abstraction has 8616 states and 20826 transitions. [2021-06-12 21:08:18,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.4375) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8616 states and 20826 transitions. [2021-06-12 21:08:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:08:18,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:18,216 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:18,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:08:18,417 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2113535449, now seen corresponding path program 107 times [2021-06-12 21:08:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:18,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022512276] [2021-06-12 21:08:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:18,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:18,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022512276] [2021-06-12 21:08:18,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022512276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:18,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363949698] [2021-06-12 21:08:18,657 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 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 [2021-06-12 21:08:18,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 21:08:18,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:08:18,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-12 21:08:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:19,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363949698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:19,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:19,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 50 [2021-06-12 21:08:19,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964733973] [2021-06-12 21:08:19,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:08:19,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:08:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:08:19,493 INFO L87 Difference]: Start difference. First operand 8616 states and 20826 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:29,389 INFO L93 Difference]: Finished difference Result 18453 states and 41420 transitions. [2021-06-12 21:08:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-06-12 21:08:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:08:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:29,405 INFO L225 Difference]: With dead ends: 18453 [2021-06-12 21:08:29,405 INFO L226 Difference]: Without dead ends: 18405 [2021-06-12 21:08:29,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22263 ImplicationChecksByTransitivity, 6235.0ms TimeCoverageRelationStatistics Valid=5109, Invalid=55161, Unknown=0, NotChecked=0, Total=60270 [2021-06-12 21:08:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-12 21:08:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 8296. [2021-06-12 21:08:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8296 states, 8295 states have (on average 2.4176009644364074) internal successors, (20054), 8295 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8296 states to 8296 states and 20054 transitions. [2021-06-12 21:08:29,526 INFO L78 Accepts]: Start accepts. Automaton has 8296 states and 20054 transitions. Word has length 63 [2021-06-12 21:08:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:29,526 INFO L482 AbstractCegarLoop]: Abstraction has 8296 states and 20054 transitions. [2021-06-12 21:08:29,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8296 states and 20054 transitions. [2021-06-12 21:08:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:08:29,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:29,533 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:29,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-12 21:08:29,733 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:29,734 INFO L82 PathProgramCache]: Analyzing trace with hash 232798557, now seen corresponding path program 108 times [2021-06-12 21:08:29,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:29,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393472653] [2021-06-12 21:08:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:29,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:29,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393472653] [2021-06-12 21:08:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393472653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:29,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689464916] [2021-06-12 21:08:29,972 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 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 [2021-06-12 21:08:30,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 21:08:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:08:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-12 21:08:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 6 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:30,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689464916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:30,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:30,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 50 [2021-06-12 21:08:30,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479850353] [2021-06-12 21:08:30,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:08:30,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:30,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:08:30,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2297, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:08:30,812 INFO L87 Difference]: Start difference. First operand 8296 states and 20054 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:40,537 INFO L93 Difference]: Finished difference Result 20814 states and 46375 transitions. [2021-06-12 21:08:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-12 21:08:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:08:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:40,554 INFO L225 Difference]: With dead ends: 20814 [2021-06-12 21:08:40,555 INFO L226 Difference]: Without dead ends: 20736 [2021-06-12 21:08:40,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28610 ImplicationChecksByTransitivity, 6972.1ms TimeCoverageRelationStatistics Valid=6992, Invalid=68358, Unknown=0, NotChecked=0, Total=75350 [2021-06-12 21:08:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20736 states. [2021-06-12 21:08:40,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20736 to 8280. [2021-06-12 21:08:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8280 states, 8279 states have (on average 2.4179248701534) internal successors, (20018), 8279 states have internal predecessors, (20018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8280 states to 8280 states and 20018 transitions. [2021-06-12 21:08:40,683 INFO L78 Accepts]: Start accepts. Automaton has 8280 states and 20018 transitions. Word has length 63 [2021-06-12 21:08:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:40,684 INFO L482 AbstractCegarLoop]: Abstraction has 8280 states and 20018 transitions. [2021-06-12 21:08:40,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 50 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 8280 states and 20018 transitions. [2021-06-12 21:08:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:08:40,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:40,690 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:40,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:08:40,890 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash -742874655, now seen corresponding path program 109 times [2021-06-12 21:08:40,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:40,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027264871] [2021-06-12 21:08:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:41,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027264871] [2021-06-12 21:08:41,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027264871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:41,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968915135] [2021-06-12 21:08:41,157 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 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 [2021-06-12 21:08:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-12 21:08:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 12 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:41,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968915135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:41,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:41,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 51 [2021-06-12 21:08:41,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971218812] [2021-06-12 21:08:41,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-12 21:08:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-12 21:08:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2379, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:08:41,958 INFO L87 Difference]: Start difference. First operand 8280 states and 20018 transitions. Second operand has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:08:51,517 INFO L93 Difference]: Finished difference Result 23395 states and 51906 transitions. [2021-06-12 21:08:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2021-06-12 21:08:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:08:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:08:51,538 INFO L225 Difference]: With dead ends: 23395 [2021-06-12 21:08:51,538 INFO L226 Difference]: Without dead ends: 23281 [2021-06-12 21:08:51,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31036 ImplicationChecksByTransitivity, 7108.4ms TimeCoverageRelationStatistics Valid=8486, Invalid=71886, Unknown=0, NotChecked=0, Total=80372 [2021-06-12 21:08:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23281 states. [2021-06-12 21:08:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23281 to 8204. [2021-06-12 21:08:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8204 states, 8203 states have (on average 2.4183835182250397) internal successors, (19838), 8203 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8204 states to 8204 states and 19838 transitions. [2021-06-12 21:08:51,677 INFO L78 Accepts]: Start accepts. Automaton has 8204 states and 19838 transitions. Word has length 63 [2021-06-12 21:08:51,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:08:51,677 INFO L482 AbstractCegarLoop]: Abstraction has 8204 states and 19838 transitions. [2021-06-12 21:08:51,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.326923076923077) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:08:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 8204 states and 19838 transitions. [2021-06-12 21:08:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:08:51,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:08:51,683 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:08:51,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-12 21:08:51,884 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:08:51,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:08:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2113730405, now seen corresponding path program 110 times [2021-06-12 21:08:51,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:08:51,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104481767] [2021-06-12 21:08:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:08:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:08:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:52,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:08:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104481767] [2021-06-12 21:08:52,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104481767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526164264] [2021-06-12 21:08:52,141 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 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 [2021-06-12 21:08:52,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:08:52,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:08:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:08:52,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:08:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:08:52,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526164264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:08:52,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:08:52,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 52 [2021-06-12 21:08:52,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832242874] [2021-06-12 21:08:52,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-12 21:08:52,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:08:52,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-12 21:08:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:08:52,925 INFO L87 Difference]: Start difference. First operand 8204 states and 19838 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:01,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:01,880 INFO L93 Difference]: Finished difference Result 26465 states and 58445 transitions. [2021-06-12 21:09:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-06-12 21:09:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:01,905 INFO L225 Difference]: With dead ends: 26465 [2021-06-12 21:09:01,905 INFO L226 Difference]: Without dead ends: 26309 [2021-06-12 21:09:01,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26772 ImplicationChecksByTransitivity, 6038.3ms TimeCoverageRelationStatistics Valid=8589, Invalid=60843, Unknown=0, NotChecked=0, Total=69432 [2021-06-12 21:09:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2021-06-12 21:09:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 8152. [2021-06-12 21:09:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.4210526315789473) internal successors, (19734), 8151 states have internal predecessors, (19734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 19734 transitions. [2021-06-12 21:09:02,050 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 19734 transitions. Word has length 63 [2021-06-12 21:09:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:02,050 INFO L482 AbstractCegarLoop]: Abstraction has 8152 states and 19734 transitions. [2021-06-12 21:09:02,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 19734 transitions. [2021-06-12 21:09:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:09:02,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:02,056 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:02,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:09:02,258 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1932982761, now seen corresponding path program 111 times [2021-06-12 21:09:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:02,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297416523] [2021-06-12 21:09:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:02,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:02,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297416523] [2021-06-12 21:09:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297416523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:02,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43351016] [2021-06-12 21:09:02,502 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 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 [2021-06-12 21:09:02,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 21:09:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:09:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:09:02,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 30 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:03,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43351016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:03,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:03,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2021-06-12 21:09:03,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505723974] [2021-06-12 21:09:03,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 21:09:03,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:03,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 21:09:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2543, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:09:03,275 INFO L87 Difference]: Start difference. First operand 8152 states and 19734 transitions. Second operand has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:08,917 INFO L93 Difference]: Finished difference Result 29047 states and 63963 transitions. [2021-06-12 21:09:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-12 21:09:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:08,946 INFO L225 Difference]: With dead ends: 29047 [2021-06-12 21:09:08,946 INFO L226 Difference]: Without dead ends: 28687 [2021-06-12 21:09:08,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16150 ImplicationChecksByTransitivity, 4547.8ms TimeCoverageRelationStatistics Valid=6194, Invalid=36862, Unknown=0, NotChecked=0, Total=43056 [2021-06-12 21:09:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28687 states. [2021-06-12 21:09:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28687 to 8192. [2021-06-12 21:09:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8192 states, 8191 states have (on average 2.418996459528751) internal successors, (19814), 8191 states have internal predecessors, (19814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8192 states to 8192 states and 19814 transitions. [2021-06-12 21:09:09,110 INFO L78 Accepts]: Start accepts. Automaton has 8192 states and 19814 transitions. Word has length 63 [2021-06-12 21:09:09,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:09,110 INFO L482 AbstractCegarLoop]: Abstraction has 8192 states and 19814 transitions. [2021-06-12 21:09:09,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.240740740740741) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 8192 states and 19814 transitions. [2021-06-12 21:09:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:09:09,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:09,116 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:09,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-12 21:09:09,316 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:09,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1308649837, now seen corresponding path program 112 times [2021-06-12 21:09:09,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:09,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614798780] [2021-06-12 21:09:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:09,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:09,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614798780] [2021-06-12 21:09:09,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614798780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:09,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986477992] [2021-06-12 21:09:09,571 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 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 [2021-06-12 21:09:09,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:09:09,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:09:09,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:09:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 42 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:10,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986477992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:10,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:10,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2021-06-12 21:09:10,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451396375] [2021-06-12 21:09:10,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-12 21:09:10,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:10,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-12 21:09:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2622, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:09:10,379 INFO L87 Difference]: Start difference. First operand 8192 states and 19814 transitions. Second operand has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:16,285 INFO L93 Difference]: Finished difference Result 29747 states and 65287 transitions. [2021-06-12 21:09:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-06-12 21:09:16,286 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:16,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:16,315 INFO L225 Difference]: With dead ends: 29747 [2021-06-12 21:09:16,315 INFO L226 Difference]: Without dead ends: 29174 [2021-06-12 21:09:16,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19920 ImplicationChecksByTransitivity, 4978.9ms TimeCoverageRelationStatistics Valid=8171, Invalid=43585, Unknown=0, NotChecked=0, Total=51756 [2021-06-12 21:09:16,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29174 states. [2021-06-12 21:09:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29174 to 8224. [2021-06-12 21:09:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8224 states, 8223 states have (on average 2.417365924844947) internal successors, (19878), 8223 states have internal predecessors, (19878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 19878 transitions. [2021-06-12 21:09:16,485 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 19878 transitions. Word has length 63 [2021-06-12 21:09:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:16,485 INFO L482 AbstractCegarLoop]: Abstraction has 8224 states and 19878 transitions. [2021-06-12 21:09:16,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 19878 transitions. [2021-06-12 21:09:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:09:16,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:16,492 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:16,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 21:09:16,693 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:16,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1493370353, now seen corresponding path program 113 times [2021-06-12 21:09:16,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:16,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044776417] [2021-06-12 21:09:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:16,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044776417] [2021-06-12 21:09:16,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044776417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106508134] [2021-06-12 21:09:16,960 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 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 [2021-06-12 21:09:16,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 21:09:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:09:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-12 21:09:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 56 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:17,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106508134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:17,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:17,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 56 [2021-06-12 21:09:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331666198] [2021-06-12 21:09:17,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 21:09:17,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 21:09:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:09:17,726 INFO L87 Difference]: Start difference. First operand 8224 states and 19878 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:24,574 INFO L93 Difference]: Finished difference Result 28419 states and 62099 transitions. [2021-06-12 21:09:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-12 21:09:24,574 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:24,602 INFO L225 Difference]: With dead ends: 28419 [2021-06-12 21:09:24,602 INFO L226 Difference]: Without dead ends: 27744 [2021-06-12 21:09:24,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26898 ImplicationChecksByTransitivity, 5790.8ms TimeCoverageRelationStatistics Valid=11861, Invalid=54445, Unknown=0, NotChecked=0, Total=66306 [2021-06-12 21:09:24,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2021-06-12 21:09:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 8248. [2021-06-12 21:09:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8248 states, 8247 states have (on average 2.4161513277555473) internal successors, (19926), 8247 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8248 states to 8248 states and 19926 transitions. [2021-06-12 21:09:24,781 INFO L78 Accepts]: Start accepts. Automaton has 8248 states and 19926 transitions. Word has length 63 [2021-06-12 21:09:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:24,781 INFO L482 AbstractCegarLoop]: Abstraction has 8248 states and 19926 transitions. [2021-06-12 21:09:24,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 8248 states and 19926 transitions. [2021-06-12 21:09:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:09:24,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:24,787 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:24,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:09:24,987 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash 184061813, now seen corresponding path program 114 times [2021-06-12 21:09:24,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:24,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943185656] [2021-06-12 21:09:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:25,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943185656] [2021-06-12 21:09:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943185656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:25,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941523969] [2021-06-12 21:09:25,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:09:25,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 21:09:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:09:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 21:09:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 72 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:26,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941523969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:26,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:26,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-06-12 21:09:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729193581] [2021-06-12 21:09:26,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 21:09:26,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 21:09:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2768, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:09:26,032 INFO L87 Difference]: Start difference. First operand 8248 states and 19926 transitions. Second operand has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:32,536 INFO L93 Difference]: Finished difference Result 27835 states and 60645 transitions. [2021-06-12 21:09:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-12 21:09:32,536 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:32,562 INFO L225 Difference]: With dead ends: 27835 [2021-06-12 21:09:32,562 INFO L226 Difference]: Without dead ends: 26926 [2021-06-12 21:09:32,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 5619.1ms TimeCoverageRelationStatistics Valid=12784, Invalid=52496, Unknown=0, NotChecked=0, Total=65280 [2021-06-12 21:09:32,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26926 states. [2021-06-12 21:09:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26926 to 8264. [2021-06-12 21:09:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8264 states, 8263 states have (on average 2.4153455161563597) internal successors, (19958), 8263 states have internal predecessors, (19958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8264 states to 8264 states and 19958 transitions. [2021-06-12 21:09:32,717 INFO L78 Accepts]: Start accepts. Automaton has 8264 states and 19958 transitions. Word has length 63 [2021-06-12 21:09:32,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:32,718 INFO L482 AbstractCegarLoop]: Abstraction has 8264 states and 19958 transitions. [2021-06-12 21:09:32,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.1228070175438596) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8264 states and 19958 transitions. [2021-06-12 21:09:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:09:32,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:32,723 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:32,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:09:32,924 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:32,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:32,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2102737415, now seen corresponding path program 115 times [2021-06-12 21:09:32,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:32,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180418671] [2021-06-12 21:09:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:33,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180418671] [2021-06-12 21:09:33,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180418671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:33,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437409070] [2021-06-12 21:09:33,254 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 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 [2021-06-12 21:09:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:33,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:09:33,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 90 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437409070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:34,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:34,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-06-12 21:09:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381955119] [2021-06-12 21:09:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-12 21:09:34,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-12 21:09:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=2926, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:09:34,069 INFO L87 Difference]: Start difference. First operand 8264 states and 19958 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:41,760 INFO L93 Difference]: Finished difference Result 25077 states and 55934 transitions. [2021-06-12 21:09:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-06-12 21:09:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:41,780 INFO L225 Difference]: With dead ends: 25077 [2021-06-12 21:09:41,780 INFO L226 Difference]: Without dead ends: 24000 [2021-06-12 21:09:41,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29595 ImplicationChecksByTransitivity, 6859.2ms TimeCoverageRelationStatistics Valid=15969, Invalid=59931, Unknown=0, NotChecked=0, Total=75900 [2021-06-12 21:09:41,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24000 states. [2021-06-12 21:09:41,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24000 to 8860. [2021-06-12 21:09:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.3754374082853595) internal successors, (21044), 8859 states have internal predecessors, (21044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 21044 transitions. [2021-06-12 21:09:41,944 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 21044 transitions. Word has length 63 [2021-06-12 21:09:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:41,944 INFO L482 AbstractCegarLoop]: Abstraction has 8860 states and 21044 transitions. [2021-06-12 21:09:41,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 21044 transitions. [2021-06-12 21:09:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-12 21:09:41,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:41,951 INFO L472 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:42,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-12 21:09:42,152 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 248636239, now seen corresponding path program 116 times [2021-06-12 21:09:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:42,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569460916] [2021-06-12 21:09:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:42,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569460916] [2021-06-12 21:09:42,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569460916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:42,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524018592] [2021-06-12 21:09:42,312 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 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 [2021-06-12 21:09:42,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:09:42,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:09:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:09:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 123 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:43,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524018592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:43,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:43,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 46 [2021-06-12 21:09:43,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281542806] [2021-06-12 21:09:43,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-12 21:09:43,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:43,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-12 21:09:43,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:09:43,056 INFO L87 Difference]: Start difference. First operand 8860 states and 21044 transitions. Second operand has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:09:54,197 INFO L93 Difference]: Finished difference Result 18047 states and 40389 transitions. [2021-06-12 21:09:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2021-06-12 21:09:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-12 21:09:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:09:54,211 INFO L225 Difference]: With dead ends: 18047 [2021-06-12 21:09:54,211 INFO L226 Difference]: Without dead ends: 18043 [2021-06-12 21:09:54,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65131 ImplicationChecksByTransitivity, 10124.0ms TimeCoverageRelationStatistics Valid=28937, Invalid=109075, Unknown=0, NotChecked=0, Total=138012 [2021-06-12 21:09:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18043 states. [2021-06-12 21:09:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18043 to 9034. [2021-06-12 21:09:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9034 states, 9033 states have (on average 2.3871360566810584) internal successors, (21563), 9033 states have internal predecessors, (21563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9034 states to 9034 states and 21563 transitions. [2021-06-12 21:09:54,333 INFO L78 Accepts]: Start accepts. Automaton has 9034 states and 21563 transitions. Word has length 63 [2021-06-12 21:09:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:09:54,333 INFO L482 AbstractCegarLoop]: Abstraction has 9034 states and 21563 transitions. [2021-06-12 21:09:54,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 46 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:09:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9034 states and 21563 transitions. [2021-06-12 21:09:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 21:09:54,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:09:54,339 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:09:54,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:09:54,549 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:09:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:09:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -892450307, now seen corresponding path program 117 times [2021-06-12 21:09:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:09:54,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686629075] [2021-06-12 21:09:54,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:09:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:09:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:54,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:09:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686629075] [2021-06-12 21:09:54,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686629075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:54,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367701162] [2021-06-12 21:09:54,901 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 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 [2021-06-12 21:09:54,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 21:09:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:09:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-12 21:09:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:09:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:09:55,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367701162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:09:55,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:09:55,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-06-12 21:09:55,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083814449] [2021-06-12 21:09:55,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-12 21:09:55,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:09:55,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-12 21:09:55,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:09:55,823 INFO L87 Difference]: Start difference. First operand 9034 states and 21563 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:10:03,917 INFO L93 Difference]: Finished difference Result 12913 states and 29503 transitions. [2021-06-12 21:10:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-06-12 21:10:03,918 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 21:10:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:10:03,929 INFO L225 Difference]: With dead ends: 12913 [2021-06-12 21:10:03,929 INFO L226 Difference]: Without dead ends: 12355 [2021-06-12 21:10:03,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32726 ImplicationChecksByTransitivity, 7403.2ms TimeCoverageRelationStatistics Valid=21240, Invalid=58002, Unknown=0, NotChecked=0, Total=79242 [2021-06-12 21:10:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12355 states. [2021-06-12 21:10:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12355 to 8889. [2021-06-12 21:10:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 2.3834383438343836) internal successors, (21184), 8888 states have internal predecessors, (21184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 21184 transitions. [2021-06-12 21:10:04,062 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 21184 transitions. Word has length 65 [2021-06-12 21:10:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:10:04,062 INFO L482 AbstractCegarLoop]: Abstraction has 8889 states and 21184 transitions. [2021-06-12 21:10:04,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 21184 transitions. [2021-06-12 21:10:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 21:10:04,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:10:04,069 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:10:04,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:10:04,269 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:10:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:10:04,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1356747611, now seen corresponding path program 118 times [2021-06-12 21:10:04,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:10:04,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718712786] [2021-06-12 21:10:04,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:10:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:04,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:10:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718712786] [2021-06-12 21:10:04,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718712786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616499417] [2021-06-12 21:10:04,457 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 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 [2021-06-12 21:10:04,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:10:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:10:04,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 21:10:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:10:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:05,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616499417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:05,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:10:05,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30] total 45 [2021-06-12 21:10:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399783796] [2021-06-12 21:10:05,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-12 21:10:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:10:05,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-12 21:10:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:10:05,339 INFO L87 Difference]: Start difference. First operand 8889 states and 21184 transitions. Second operand has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:09,373 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-06-12 21:10:10,133 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-06-12 21:10:11,315 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-06-12 21:10:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:10:14,009 INFO L93 Difference]: Finished difference Result 10949 states and 25244 transitions. [2021-06-12 21:10:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2021-06-12 21:10:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 21:10:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:10:14,018 INFO L225 Difference]: With dead ends: 10949 [2021-06-12 21:10:14,018 INFO L226 Difference]: Without dead ends: 10945 [2021-06-12 21:10:14,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31134 ImplicationChecksByTransitivity, 8191.9ms TimeCoverageRelationStatistics Valid=16708, Invalid=54848, Unknown=0, NotChecked=0, Total=71556 [2021-06-12 21:10:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10945 states. [2021-06-12 21:10:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10945 to 8841. [2021-06-12 21:10:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3854072398190045) internal successors, (21087), 8840 states have internal predecessors, (21087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 21087 transitions. [2021-06-12 21:10:14,191 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 21087 transitions. Word has length 65 [2021-06-12 21:10:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:10:14,191 INFO L482 AbstractCegarLoop]: Abstraction has 8841 states and 21087 transitions. [2021-06-12 21:10:14,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.630434782608696) internal successors, (121), 45 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 21087 transitions. [2021-06-12 21:10:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:10:14,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:10:14,198 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:10:14,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-12 21:10:14,398 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:10:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:10:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash 426028347, now seen corresponding path program 119 times [2021-06-12 21:10:14,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:10:14,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653509699] [2021-06-12 21:10:14,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:10:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 1 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:14,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:10:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653509699] [2021-06-12 21:10:14,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653509699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:14,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589402947] [2021-06-12 21:10:14,567 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 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 [2021-06-12 21:10:14,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 21:10:14,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:10:14,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:10:14,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:10:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:14,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589402947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:14,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:10:14,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 21:10:14,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920117925] [2021-06-12 21:10:14,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:10:14,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:10:14,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:10:14,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:10:14,709 INFO L87 Difference]: Start difference. First operand 8841 states and 21087 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:14,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:10:14,943 INFO L93 Difference]: Finished difference Result 10902 states and 25809 transitions. [2021-06-12 21:10:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:10:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:10:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:10:14,953 INFO L225 Difference]: With dead ends: 10902 [2021-06-12 21:10:14,953 INFO L226 Difference]: Without dead ends: 10809 [2021-06-12 21:10:14,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:10:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10809 states. [2021-06-12 21:10:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10809 to 10150. [2021-06-12 21:10:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 2.4184648733865406) internal successors, (24545), 10149 states have internal predecessors, (24545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 24545 transitions. [2021-06-12 21:10:15,060 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 24545 transitions. Word has length 67 [2021-06-12 21:10:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:10:15,060 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 24545 transitions. [2021-06-12 21:10:15,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 24545 transitions. [2021-06-12 21:10:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:10:15,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:10:15,068 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:10:15,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:10:15,268 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:10:15,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:10:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -815506287, now seen corresponding path program 120 times [2021-06-12 21:10:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:10:15,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534409296] [2021-06-12 21:10:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:10:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:15,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:10:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534409296] [2021-06-12 21:10:15,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534409296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546505612] [2021-06-12 21:10:15,596 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 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 [2021-06-12 21:10:15,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 21:10:15,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:10:15,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-12 21:10:15,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:10:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546505612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:16,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:10:16,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31] total 51 [2021-06-12 21:10:16,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197841185] [2021-06-12 21:10:16,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-12 21:10:16,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:10:16,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-12 21:10:16,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:10:16,588 INFO L87 Difference]: Start difference. First operand 10150 states and 24545 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:10:25,780 INFO L93 Difference]: Finished difference Result 19443 states and 44030 transitions. [2021-06-12 21:10:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-12 21:10:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:10:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:10:25,797 INFO L225 Difference]: With dead ends: 19443 [2021-06-12 21:10:25,797 INFO L226 Difference]: Without dead ends: 19410 [2021-06-12 21:10:25,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14672 ImplicationChecksByTransitivity, 5316.3ms TimeCoverageRelationStatistics Valid=2943, Invalid=40113, Unknown=0, NotChecked=0, Total=43056 [2021-06-12 21:10:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19410 states. [2021-06-12 21:10:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19410 to 10699. [2021-06-12 21:10:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10699 states, 10698 states have (on average 2.419798093101514) internal successors, (25887), 10698 states have internal predecessors, (25887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10699 states to 10699 states and 25887 transitions. [2021-06-12 21:10:25,943 INFO L78 Accepts]: Start accepts. Automaton has 10699 states and 25887 transitions. Word has length 67 [2021-06-12 21:10:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:10:25,943 INFO L482 AbstractCegarLoop]: Abstraction has 10699 states and 25887 transitions. [2021-06-12 21:10:25,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10699 states and 25887 transitions. [2021-06-12 21:10:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:10:25,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:10:25,951 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:10:26,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:10:26,151 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:10:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:10:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1545872197, now seen corresponding path program 121 times [2021-06-12 21:10:26,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:10:26,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54440823] [2021-06-12 21:10:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:10:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:26,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:10:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54440823] [2021-06-12 21:10:26,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54440823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592739340] [2021-06-12 21:10:26,406 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 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 [2021-06-12 21:10:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:26,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-12 21:10:26,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:10:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 25 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:27,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592739340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:27,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:10:27,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32] total 50 [2021-06-12 21:10:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836218624] [2021-06-12 21:10:27,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:10:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:10:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:10:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:10:27,761 INFO L87 Difference]: Start difference. First operand 10699 states and 25887 transitions. Second operand has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:10:35,109 INFO L93 Difference]: Finished difference Result 13973 states and 32494 transitions. [2021-06-12 21:10:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-12 21:10:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:10:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:10:35,121 INFO L225 Difference]: With dead ends: 13973 [2021-06-12 21:10:35,121 INFO L226 Difference]: Without dead ends: 13969 [2021-06-12 21:10:35,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8803 ImplicationChecksByTransitivity, 4741.3ms TimeCoverageRelationStatistics Valid=2057, Invalid=26335, Unknown=0, NotChecked=0, Total=28392 [2021-06-12 21:10:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-06-12 21:10:35,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 10321. [2021-06-12 21:10:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 2.4169573643410853) internal successors, (24943), 10320 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 24943 transitions. [2021-06-12 21:10:35,245 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 24943 transitions. Word has length 67 [2021-06-12 21:10:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:10:35,245 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 24943 transitions. [2021-06-12 21:10:35,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.450980392156863) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 24943 transitions. [2021-06-12 21:10:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:10:35,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:10:35,253 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:10:35,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:10:35,454 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:10:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:10:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1944828693, now seen corresponding path program 122 times [2021-06-12 21:10:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:10:35,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158319773] [2021-06-12 21:10:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:10:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:35,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:10:35,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158319773] [2021-06-12 21:10:35,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158319773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:35,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608462909] [2021-06-12 21:10:35,727 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 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 [2021-06-12 21:10:35,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:10:35,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:10:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-12 21:10:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:10:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:36,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608462909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:36,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:10:36,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31] total 52 [2021-06-12 21:10:36,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229952373] [2021-06-12 21:10:36,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-12 21:10:36,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:10:36,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-12 21:10:36,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:10:36,748 INFO L87 Difference]: Start difference. First operand 10321 states and 24943 transitions. Second operand has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:10:47,445 INFO L93 Difference]: Finished difference Result 22051 states and 49545 transitions. [2021-06-12 21:10:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-06-12 21:10:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:10:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:10:47,462 INFO L225 Difference]: With dead ends: 22051 [2021-06-12 21:10:47,462 INFO L226 Difference]: Without dead ends: 22003 [2021-06-12 21:10:47,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26033 ImplicationChecksByTransitivity, 6792.9ms TimeCoverageRelationStatistics Valid=5439, Invalid=65051, Unknown=0, NotChecked=0, Total=70490 [2021-06-12 21:10:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22003 states. [2021-06-12 21:10:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22003 to 10745. [2021-06-12 21:10:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.415860014892033) internal successors, (25956), 10744 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 25956 transitions. [2021-06-12 21:10:47,606 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 25956 transitions. Word has length 67 [2021-06-12 21:10:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:10:47,607 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 25956 transitions. [2021-06-12 21:10:47,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 52 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:10:47,607 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 25956 transitions. [2021-06-12 21:10:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:10:47,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:10:47,615 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:10:47,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:10:47,815 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:10:47,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:10:47,815 INFO L82 PathProgramCache]: Analyzing trace with hash 2010613401, now seen corresponding path program 123 times [2021-06-12 21:10:47,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:10:47,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85884511] [2021-06-12 21:10:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:10:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:10:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:48,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:10:48,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85884511] [2021-06-12 21:10:48,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85884511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:48,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578865815] [2021-06-12 21:10:48,076 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 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 [2021-06-12 21:10:48,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-12 21:10:48,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:10:48,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-12 21:10:48,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:10:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 6 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:10:49,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578865815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:10:49,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:10:49,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 31] total 53 [2021-06-12 21:10:49,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863063307] [2021-06-12 21:10:49,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 21:10:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:10:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 21:10:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2592, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:10:49,019 INFO L87 Difference]: Start difference. First operand 10745 states and 25956 transitions. Second operand has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:11:02,719 INFO L93 Difference]: Finished difference Result 25316 states and 56566 transitions. [2021-06-12 21:11:02,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-12 21:11:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:11:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:11:02,742 INFO L225 Difference]: With dead ends: 25316 [2021-06-12 21:11:02,743 INFO L226 Difference]: Without dead ends: 25238 [2021-06-12 21:11:02,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35837 ImplicationChecksByTransitivity, 8080.6ms TimeCoverageRelationStatistics Valid=7939, Invalid=85391, Unknown=0, NotChecked=0, Total=93330 [2021-06-12 21:11:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25238 states. [2021-06-12 21:11:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25238 to 10379. [2021-06-12 21:11:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 2.4208903449604935) internal successors, (25124), 10378 states have internal predecessors, (25124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 25124 transitions. [2021-06-12 21:11:02,905 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 25124 transitions. Word has length 67 [2021-06-12 21:11:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:11:02,905 INFO L482 AbstractCegarLoop]: Abstraction has 10379 states and 25124 transitions. [2021-06-12 21:11:02,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.388888888888889) internal successors, (129), 53 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 25124 transitions. [2021-06-12 21:11:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:11:02,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:11:02,912 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:11:03,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-12 21:11:03,113 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:11:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:11:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash -963543267, now seen corresponding path program 124 times [2021-06-12 21:11:03,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:11:03,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36693904] [2021-06-12 21:11:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:11:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:11:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:03,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:11:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36693904] [2021-06-12 21:11:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36693904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568009425] [2021-06-12 21:11:03,379 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 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 [2021-06-12 21:11:03,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:11:03,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:11:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-12 21:11:03,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:11:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 12 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568009425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:04,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:11:04,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 54 [2021-06-12 21:11:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431472739] [2021-06-12 21:11:04,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-12 21:11:04,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:11:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-12 21:11:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:11:04,311 INFO L87 Difference]: Start difference. First operand 10379 states and 25124 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:17,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:11:17,909 INFO L93 Difference]: Finished difference Result 28045 states and 62416 transitions. [2021-06-12 21:11:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2021-06-12 21:11:17,909 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:11:17,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:11:17,937 INFO L225 Difference]: With dead ends: 28045 [2021-06-12 21:11:17,937 INFO L226 Difference]: Without dead ends: 27931 [2021-06-12 21:11:17,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40964 ImplicationChecksByTransitivity, 8467.6ms TimeCoverageRelationStatistics Valid=10037, Invalid=94615, Unknown=0, NotChecked=0, Total=104652 [2021-06-12 21:11:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27931 states. [2021-06-12 21:11:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27931 to 10315. [2021-06-12 21:11:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10315 states, 10314 states have (on average 2.4203994570486715) internal successors, (24964), 10314 states have internal predecessors, (24964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10315 states to 10315 states and 24964 transitions. [2021-06-12 21:11:18,114 INFO L78 Accepts]: Start accepts. Automaton has 10315 states and 24964 transitions. Word has length 67 [2021-06-12 21:11:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:11:18,114 INFO L482 AbstractCegarLoop]: Abstraction has 10315 states and 24964 transitions. [2021-06-12 21:11:18,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 54 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 10315 states and 24964 transitions. [2021-06-12 21:11:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:11:18,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:11:18,122 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:11:18,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable639,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:11:18,322 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:11:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:11:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1200841889, now seen corresponding path program 125 times [2021-06-12 21:11:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:11:18,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113514314] [2021-06-12 21:11:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:11:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:11:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:18,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:11:18,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113514314] [2021-06-12 21:11:18,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113514314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:18,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457085333] [2021-06-12 21:11:18,649 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 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 [2021-06-12 21:11:18,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-12 21:11:18,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:11:18,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-12 21:11:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:11:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 20 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:19,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457085333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:19,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:11:19,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 56 [2021-06-12 21:11:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610561628] [2021-06-12 21:11:19,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 21:11:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:11:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 21:11:19,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:11:19,524 INFO L87 Difference]: Start difference. First operand 10315 states and 24964 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:11:30,344 INFO L93 Difference]: Finished difference Result 31079 states and 68899 transitions. [2021-06-12 21:11:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-06-12 21:11:30,344 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:11:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:11:30,376 INFO L225 Difference]: With dead ends: 31079 [2021-06-12 21:11:30,376 INFO L226 Difference]: Without dead ends: 30923 [2021-06-12 21:11:30,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39065 ImplicationChecksByTransitivity, 8058.5ms TimeCoverageRelationStatistics Valid=11051, Invalid=87231, Unknown=0, NotChecked=0, Total=98282 [2021-06-12 21:11:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30923 states. [2021-06-12 21:11:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30923 to 10231. [2021-06-12 21:11:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10231 states, 10230 states have (on average 2.4218963831867057) internal successors, (24776), 10230 states have internal predecessors, (24776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10231 states to 10231 states and 24776 transitions. [2021-06-12 21:11:30,572 INFO L78 Accepts]: Start accepts. Automaton has 10231 states and 24776 transitions. Word has length 67 [2021-06-12 21:11:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:11:30,572 INFO L482 AbstractCegarLoop]: Abstraction has 10231 states and 24776 transitions. [2021-06-12 21:11:30,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 10231 states and 24776 transitions. [2021-06-12 21:11:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:11:30,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:11:30,579 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:11:30,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-12 21:11:30,785 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:11:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:11:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1516697381, now seen corresponding path program 126 times [2021-06-12 21:11:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:11:30,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927335523] [2021-06-12 21:11:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:11:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:11:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:31,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:11:31,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927335523] [2021-06-12 21:11:31,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927335523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:31,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110512713] [2021-06-12 21:11:31,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:11:31,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-12 21:11:31,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:11:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-12 21:11:31,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:11:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 30 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:31,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110512713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:31,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:11:31,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2021-06-12 21:11:31,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802923860] [2021-06-12 21:11:31,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 21:11:31,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:11:31,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 21:11:31,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:11:31,912 INFO L87 Difference]: Start difference. First operand 10231 states and 24776 transitions. Second operand has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:11:41,187 INFO L93 Difference]: Finished difference Result 35057 states and 77375 transitions. [2021-06-12 21:11:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-06-12 21:11:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:11:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:11:41,222 INFO L225 Difference]: With dead ends: 35057 [2021-06-12 21:11:41,222 INFO L226 Difference]: Without dead ends: 34541 [2021-06-12 21:11:41,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29483 ImplicationChecksByTransitivity, 6550.0ms TimeCoverageRelationStatistics Valid=9853, Invalid=66047, Unknown=0, NotChecked=0, Total=75900 [2021-06-12 21:11:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34541 states. [2021-06-12 21:11:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34541 to 10223. [2021-06-12 21:11:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10223 states, 10222 states have (on average 2.422226570142829) internal successors, (24760), 10222 states have internal predecessors, (24760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10223 states to 10223 states and 24760 transitions. [2021-06-12 21:11:41,445 INFO L78 Accepts]: Start accepts. Automaton has 10223 states and 24760 transitions. Word has length 67 [2021-06-12 21:11:41,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:11:41,445 INFO L482 AbstractCegarLoop]: Abstraction has 10223 states and 24760 transitions. [2021-06-12 21:11:41,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.263157894736842) internal successors, (129), 56 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10223 states and 24760 transitions. [2021-06-12 21:11:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:11:41,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:11:41,452 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:11:41,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-12 21:11:41,657 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:11:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:11:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1386608297, now seen corresponding path program 127 times [2021-06-12 21:11:41,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:11:41,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005497546] [2021-06-12 21:11:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:11:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:11:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:41,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:11:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005497546] [2021-06-12 21:11:41,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005497546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:41,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812343185] [2021-06-12 21:11:41,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:11:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:11:41,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 21:11:41,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:11:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 42 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:42,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812343185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:42,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:11:42,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2021-06-12 21:11:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273189514] [2021-06-12 21:11:42,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-12 21:11:42,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:11:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-12 21:11:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:11:42,771 INFO L87 Difference]: Start difference. First operand 10223 states and 24760 transitions. Second operand has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:11:50,065 INFO L93 Difference]: Finished difference Result 37059 states and 81726 transitions. [2021-06-12 21:11:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-12 21:11:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:11:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:11:50,101 INFO L225 Difference]: With dead ends: 37059 [2021-06-12 21:11:50,102 INFO L226 Difference]: Without dead ends: 36519 [2021-06-12 21:11:50,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22513 ImplicationChecksByTransitivity, 5455.6ms TimeCoverageRelationStatistics Valid=8563, Invalid=49759, Unknown=0, NotChecked=0, Total=58322 [2021-06-12 21:11:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36519 states. [2021-06-12 21:11:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36519 to 10263. [2021-06-12 21:11:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10263 states, 10262 states have (on average 2.420580783473007) internal successors, (24840), 10262 states have internal predecessors, (24840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 24840 transitions. [2021-06-12 21:11:50,316 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 24840 transitions. Word has length 67 [2021-06-12 21:11:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:11:50,316 INFO L482 AbstractCegarLoop]: Abstraction has 10263 states and 24840 transitions. [2021-06-12 21:11:50,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.2241379310344827) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 24840 transitions. [2021-06-12 21:11:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:11:50,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:11:50,324 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:11:50,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-12 21:11:50,524 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:11:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:11:50,524 INFO L82 PathProgramCache]: Analyzing trace with hash -201710803, now seen corresponding path program 128 times [2021-06-12 21:11:50,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:11:50,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056855335] [2021-06-12 21:11:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:11:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:11:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:50,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:11:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056855335] [2021-06-12 21:11:50,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056855335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:50,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574418812] [2021-06-12 21:11:50,858 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:11:50,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:11:50,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:11:50,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-12 21:11:50,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:11:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 56 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:11:51,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574418812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:11:51,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:11:51,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2021-06-12 21:11:51,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360628606] [2021-06-12 21:11:51,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-12 21:11:51,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:11:51,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-12 21:11:51,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:11:51,764 INFO L87 Difference]: Start difference. First operand 10263 states and 24840 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:11:59,415 INFO L93 Difference]: Finished difference Result 36366 states and 79874 transitions. [2021-06-12 21:11:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-06-12 21:11:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:11:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:11:59,451 INFO L225 Difference]: With dead ends: 36366 [2021-06-12 21:11:59,451 INFO L226 Difference]: Without dead ends: 35634 [2021-06-12 21:11:59,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30002 ImplicationChecksByTransitivity, 6315.9ms TimeCoverageRelationStatistics Valid=12366, Invalid=62436, Unknown=0, NotChecked=0, Total=74802 [2021-06-12 21:11:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35634 states. [2021-06-12 21:11:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35634 to 10295. [2021-06-12 21:11:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10295 states, 10294 states have (on average 2.41927336312415) internal successors, (24904), 10294 states have internal predecessors, (24904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:59,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10295 states to 10295 states and 24904 transitions. [2021-06-12 21:11:59,677 INFO L78 Accepts]: Start accepts. Automaton has 10295 states and 24904 transitions. Word has length 67 [2021-06-12 21:11:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:11:59,677 INFO L482 AbstractCegarLoop]: Abstraction has 10295 states and 24904 transitions. [2021-06-12 21:11:59,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:11:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10295 states and 24904 transitions. [2021-06-12 21:11:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:11:59,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:11:59,684 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:11:59,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:11:59,884 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:11:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:11:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash -300073807, now seen corresponding path program 129 times [2021-06-12 21:11:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:11:59,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256785196] [2021-06-12 21:11:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:11:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:00,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:12:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256785196] [2021-06-12 21:12:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256785196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809205772] [2021-06-12 21:12:00,198 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:00,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 21:12:00,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:12:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 21:12:00,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:12:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 72 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809205772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:01,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:12:01,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 59 [2021-06-12 21:12:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498852859] [2021-06-12 21:12:01,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-12 21:12:01,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:12:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-12 21:12:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3099, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:12:01,028 INFO L87 Difference]: Start difference. First operand 10295 states and 24904 transitions. Second operand has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:12:08,758 INFO L93 Difference]: Finished difference Result 35312 states and 77377 transitions. [2021-06-12 21:12:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-06-12 21:12:08,758 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:12:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:12:08,791 INFO L225 Difference]: With dead ends: 35312 [2021-06-12 21:12:08,791 INFO L226 Difference]: Without dead ends: 34400 [2021-06-12 21:12:08,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30734 ImplicationChecksByTransitivity, 6331.5ms TimeCoverageRelationStatistics Valid=13856, Invalid=63150, Unknown=0, NotChecked=0, Total=77006 [2021-06-12 21:12:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34400 states. [2021-06-12 21:12:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34400 to 10319. [2021-06-12 21:12:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10319 states, 10318 states have (on average 2.418298119790657) internal successors, (24952), 10318 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10319 states to 10319 states and 24952 transitions. [2021-06-12 21:12:08,996 INFO L78 Accepts]: Start accepts. Automaton has 10319 states and 24952 transitions. Word has length 67 [2021-06-12 21:12:08,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:12:08,996 INFO L482 AbstractCegarLoop]: Abstraction has 10319 states and 24952 transitions. [2021-06-12 21:12:08,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.15) internal successors, (129), 59 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand 10319 states and 24952 transitions. [2021-06-12 21:12:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:12:09,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:12:09,003 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:12:09,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-12 21:12:09,203 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:12:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:12:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1490617141, now seen corresponding path program 130 times [2021-06-12 21:12:09,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:12:09,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575798542] [2021-06-12 21:12:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:12:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:09,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:12:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575798542] [2021-06-12 21:12:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575798542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283802310] [2021-06-12 21:12:09,523 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:09,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:12:09,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:12:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 21:12:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:12:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 90 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:10,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283802310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:10,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:12:10,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2021-06-12 21:12:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655236446] [2021-06-12 21:12:10,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-12 21:12:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:12:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-12 21:12:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:12:10,412 INFO L87 Difference]: Start difference. First operand 10319 states and 24952 transitions. Second operand has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:12:18,029 INFO L93 Difference]: Finished difference Result 33658 states and 73530 transitions. [2021-06-12 21:12:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-06-12 21:12:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:12:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:12:18,060 INFO L225 Difference]: With dead ends: 33658 [2021-06-12 21:12:18,060 INFO L226 Difference]: Without dead ends: 32578 [2021-06-12 21:12:18,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33793 ImplicationChecksByTransitivity, 6748.7ms TimeCoverageRelationStatistics Valid=16733, Invalid=67077, Unknown=0, NotChecked=0, Total=83810 [2021-06-12 21:12:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32578 states. [2021-06-12 21:12:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32578 to 10335. [2021-06-12 21:12:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.4176504741629574) internal successors, (24984), 10334 states have internal predecessors, (24984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 24984 transitions. [2021-06-12 21:12:18,269 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 24984 transitions. Word has length 67 [2021-06-12 21:12:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:12:18,269 INFO L482 AbstractCegarLoop]: Abstraction has 10335 states and 24984 transitions. [2021-06-12 21:12:18,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 60 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 24984 transitions. [2021-06-12 21:12:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:12:18,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:12:18,276 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:12:18,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:18,477 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:12:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:12:18,477 INFO L82 PathProgramCache]: Analyzing trace with hash 805779129, now seen corresponding path program 131 times [2021-06-12 21:12:18,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:12:18,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631372048] [2021-06-12 21:12:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:12:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:18,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:12:18,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631372048] [2021-06-12 21:12:18,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631372048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:18,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216584639] [2021-06-12 21:12:18,919 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:18,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 21:12:18,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:12:18,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-12 21:12:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:12:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 110 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:19,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216584639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:19,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:12:19,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-06-12 21:12:19,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243353756] [2021-06-12 21:12:19,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-12 21:12:19,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:12:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-12 21:12:19,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=3340, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:12:19,761 INFO L87 Difference]: Start difference. First operand 10335 states and 24984 transitions. Second operand has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:12:28,754 INFO L93 Difference]: Finished difference Result 29282 states and 65375 transitions. [2021-06-12 21:12:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-06-12 21:12:28,755 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:12:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:12:28,782 INFO L225 Difference]: With dead ends: 29282 [2021-06-12 21:12:28,782 INFO L226 Difference]: Without dead ends: 28076 [2021-06-12 21:12:28,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39537 ImplicationChecksByTransitivity, 8035.4ms TimeCoverageRelationStatistics Valid=20497, Invalid=75913, Unknown=0, NotChecked=0, Total=96410 [2021-06-12 21:12:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28076 states. [2021-06-12 21:12:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28076 to 10468. [2021-06-12 21:12:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10468 states, 10467 states have (on average 2.3830132798318524) internal successors, (24943), 10467 states have internal predecessors, (24943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10468 states to 10468 states and 24943 transitions. [2021-06-12 21:12:28,994 INFO L78 Accepts]: Start accepts. Automaton has 10468 states and 24943 transitions. Word has length 67 [2021-06-12 21:12:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:12:28,994 INFO L482 AbstractCegarLoop]: Abstraction has 10468 states and 24943 transitions. [2021-06-12 21:12:28,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10468 states and 24943 transitions. [2021-06-12 21:12:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-12 21:12:29,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:12:29,002 INFO L472 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:12:29,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:29,202 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:12:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:12:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1637879469, now seen corresponding path program 132 times [2021-06-12 21:12:29,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:12:29,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566135203] [2021-06-12 21:12:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:12:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:29,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:12:29,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566135203] [2021-06-12 21:12:29,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566135203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:29,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135864670] [2021-06-12 21:12:29,374 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:29,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 21:12:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:12:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-12 21:12:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:12:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 146 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135864670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:30,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:12:30,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 49 [2021-06-12 21:12:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954889266] [2021-06-12 21:12:30,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 21:12:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:12:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 21:12:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:12:30,198 INFO L87 Difference]: Start difference. First operand 10468 states and 24943 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:12:43,575 INFO L93 Difference]: Finished difference Result 20078 states and 44963 transitions. [2021-06-12 21:12:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-06-12 21:12:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-12 21:12:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:12:43,591 INFO L225 Difference]: With dead ends: 20078 [2021-06-12 21:12:43,591 INFO L226 Difference]: Without dead ends: 20074 [2021-06-12 21:12:43,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 426 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88148 ImplicationChecksByTransitivity, 12482.2ms TimeCoverageRelationStatistics Valid=38110, Invalid=144646, Unknown=0, NotChecked=0, Total=182756 [2021-06-12 21:12:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20074 states. [2021-06-12 21:12:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20074 to 10541. [2021-06-12 21:12:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10541 states, 10540 states have (on average 2.3928842504743835) internal successors, (25221), 10540 states have internal predecessors, (25221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10541 states to 10541 states and 25221 transitions. [2021-06-12 21:12:43,741 INFO L78 Accepts]: Start accepts. Automaton has 10541 states and 25221 transitions. Word has length 67 [2021-06-12 21:12:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:12:43,741 INFO L482 AbstractCegarLoop]: Abstraction has 10541 states and 25221 transitions. [2021-06-12 21:12:43,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10541 states and 25221 transitions. [2021-06-12 21:12:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-12 21:12:43,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:12:43,748 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:12:43,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-12 21:12:43,949 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:12:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:12:43,949 INFO L82 PathProgramCache]: Analyzing trace with hash 192572857, now seen corresponding path program 133 times [2021-06-12 21:12:43,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:12:43,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240764956] [2021-06-12 21:12:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:12:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:44,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:12:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240764956] [2021-06-12 21:12:44,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240764956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615708399] [2021-06-12 21:12:44,336 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-12 21:12:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:12:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615708399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:45,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:12:45,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 63 [2021-06-12 21:12:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345780424] [2021-06-12 21:12:45,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-06-12 21:12:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:12:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-06-12 21:12:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=3321, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:12:45,236 INFO L87 Difference]: Start difference. First operand 10541 states and 25221 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:12:54,538 INFO L93 Difference]: Finished difference Result 14048 states and 32048 transitions. [2021-06-12 21:12:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-06-12 21:12:54,538 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-12 21:12:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:12:54,549 INFO L225 Difference]: With dead ends: 14048 [2021-06-12 21:12:54,549 INFO L226 Difference]: Without dead ends: 13436 [2021-06-12 21:12:54,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42486 ImplicationChecksByTransitivity, 8440.8ms TimeCoverageRelationStatistics Valid=27030, Invalid=73142, Unknown=0, NotChecked=0, Total=100172 [2021-06-12 21:12:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13436 states. [2021-06-12 21:12:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13436 to 10532. [2021-06-12 21:12:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.3910359889849016) internal successors, (25180), 10531 states have internal predecessors, (25180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25180 transitions. [2021-06-12 21:12:54,663 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25180 transitions. Word has length 69 [2021-06-12 21:12:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:12:54,663 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25180 transitions. [2021-06-12 21:12:54,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:12:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25180 transitions. [2021-06-12 21:12:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-12 21:12:54,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:12:54,720 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:12:54,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:54,921 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:12:54,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:12:54,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1907055525, now seen corresponding path program 134 times [2021-06-12 21:12:54,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:12:54,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780510877] [2021-06-12 21:12:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:12:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:12:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:55,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:12:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780510877] [2021-06-12 21:12:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780510877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775844910] [2021-06-12 21:12:55,088 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:12:55,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:12:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:12:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 21:12:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:12:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:12:55,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775844910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:12:55,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:12:55,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32] total 48 [2021-06-12 21:12:55,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414336549] [2021-06-12 21:12:55,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-12 21:12:55,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:12:55,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-12 21:12:55,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1881, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:12:55,919 INFO L87 Difference]: Start difference. First operand 10532 states and 25180 transitions. Second operand has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:13:04,052 INFO L93 Difference]: Finished difference Result 12908 states and 29868 transitions. [2021-06-12 21:13:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-06-12 21:13:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-12 21:13:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:13:04,062 INFO L225 Difference]: With dead ends: 12908 [2021-06-12 21:13:04,062 INFO L226 Difference]: Without dead ends: 12904 [2021-06-12 21:13:04,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40550 ImplicationChecksByTransitivity, 7709.1ms TimeCoverageRelationStatistics Valid=21246, Invalid=69656, Unknown=0, NotChecked=0, Total=90902 [2021-06-12 21:13:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2021-06-12 21:13:04,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 10532. [2021-06-12 21:13:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 2.390941031241098) internal successors, (25179), 10531 states have internal predecessors, (25179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 25179 transitions. [2021-06-12 21:13:04,169 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 25179 transitions. Word has length 69 [2021-06-12 21:13:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:13:04,169 INFO L482 AbstractCegarLoop]: Abstraction has 10532 states and 25179 transitions. [2021-06-12 21:13:04,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.63265306122449) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 25179 transitions. [2021-06-12 21:13:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-12 21:13:04,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:13:04,177 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:13:04,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:04,378 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:13:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:13:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1564076785, now seen corresponding path program 135 times [2021-06-12 21:13:04,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:13:04,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222260517] [2021-06-12 21:13:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:13:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:13:04,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:13:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222260517] [2021-06-12 21:13:04,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222260517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429974219] [2021-06-12 21:13:04,547 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:04,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 21:13:04,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:13:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-12 21:13:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:13:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:05,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429974219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:05,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:13:05,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-12 21:13:05,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721185430] [2021-06-12 21:13:05,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:13:05,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:13:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:13:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2099, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:13:05,482 INFO L87 Difference]: Start difference. First operand 10532 states and 25179 transitions. Second operand has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:13:12,902 INFO L93 Difference]: Finished difference Result 24107 states and 54772 transitions. [2021-06-12 21:13:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-12 21:13:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-12 21:13:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:13:12,923 INFO L225 Difference]: With dead ends: 24107 [2021-06-12 21:13:12,923 INFO L226 Difference]: Without dead ends: 24107 [2021-06-12 21:13:12,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21229 ImplicationChecksByTransitivity, 6867.9ms TimeCoverageRelationStatistics Valid=13586, Invalid=43296, Unknown=0, NotChecked=0, Total=56882 [2021-06-12 21:13:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24107 states. [2021-06-12 21:13:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24107 to 16231. [2021-06-12 21:13:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16231 states, 16230 states have (on average 2.4091189155884165) internal successors, (39100), 16230 states have internal predecessors, (39100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16231 states to 16231 states and 39100 transitions. [2021-06-12 21:13:13,140 INFO L78 Accepts]: Start accepts. Automaton has 16231 states and 39100 transitions. Word has length 69 [2021-06-12 21:13:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:13:13,140 INFO L482 AbstractCegarLoop]: Abstraction has 16231 states and 39100 transitions. [2021-06-12 21:13:13,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.607843137254902) internal successors, (133), 50 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16231 states and 39100 transitions. [2021-06-12 21:13:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:13:13,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:13:13,153 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:13:13,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-12 21:13:13,354 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:13:13,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:13:13,354 INFO L82 PathProgramCache]: Analyzing trace with hash -543763977, now seen corresponding path program 136 times [2021-06-12 21:13:13,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:13:13,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740269214] [2021-06-12 21:13:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:13:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 1 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:13,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:13:13,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740269214] [2021-06-12 21:13:13,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740269214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:13,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816249950] [2021-06-12 21:13:13,521 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:13,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:13:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:13:13,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-12 21:13:13,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:13:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:13,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816249950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:13,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:13:13,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-12 21:13:13,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711537162] [2021-06-12 21:13:13,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:13:13,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:13:13,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:13:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:13:13,651 INFO L87 Difference]: Start difference. First operand 16231 states and 39100 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) [2021-06-12 21:13:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:13:13,920 INFO L93 Difference]: Finished difference Result 19318 states and 46494 transitions. [2021-06-12 21:13:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:13:13,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) Word has length 71 [2021-06-12 21:13:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:13:13,939 INFO L225 Difference]: With dead ends: 19318 [2021-06-12 21:13:13,939 INFO L226 Difference]: Without dead ends: 19219 [2021-06-12 21:13:13,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:13:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19219 states. [2021-06-12 21:13:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19219 to 18332. [2021-06-12 21:13:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18332 states, 18331 states have (on average 2.4355463422617425) internal successors, (44646), 18331 states have internal predecessors, (44646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18332 states to 18332 states and 44646 transitions. [2021-06-12 21:13:14,143 INFO L78 Accepts]: Start accepts. Automaton has 18332 states and 44646 transitions. Word has length 71 [2021-06-12 21:13:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:13:14,144 INFO L482 AbstractCegarLoop]: Abstraction has 18332 states and 44646 transitions. [2021-06-12 21:13:14,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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) [2021-06-12 21:13:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 18332 states and 44646 transitions. [2021-06-12 21:13:14,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:13:14,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:13:14,158 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:13:14,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-12 21:13:14,359 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:13:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:13:14,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1240447561, now seen corresponding path program 137 times [2021-06-12 21:13:14,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:13:14,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871729858] [2021-06-12 21:13:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:13:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:14,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:13:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871729858] [2021-06-12 21:13:14,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871729858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127504112] [2021-06-12 21:13:14,951 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:14,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 21:13:14,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:13:14,996 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 85 conjunts are in the unsatisfiable core [2021-06-12 21:13:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:13:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:16,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127504112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:16,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:13:16,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-12 21:13:16,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760144719] [2021-06-12 21:13:16,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-12 21:13:16,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:13:16,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-12 21:13:16,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4037, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:13:16,219 INFO L87 Difference]: Start difference. First operand 18332 states and 44646 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:13:23,652 INFO L93 Difference]: Finished difference Result 22788 states and 54409 transitions. [2021-06-12 21:13:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-12 21:13:23,652 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-12 21:13:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:13:23,672 INFO L225 Difference]: With dead ends: 22788 [2021-06-12 21:13:23,673 INFO L226 Difference]: Without dead ends: 22782 [2021-06-12 21:13:23,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8535 ImplicationChecksByTransitivity, 5369.9ms TimeCoverageRelationStatistics Valid=1710, Invalid=29796, Unknown=0, NotChecked=0, Total=31506 [2021-06-12 21:13:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22782 states. [2021-06-12 21:13:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22782 to 18201. [2021-06-12 21:13:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18201 states, 18200 states have (on average 2.431263736263736) internal successors, (44249), 18200 states have internal predecessors, (44249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18201 states to 18201 states and 44249 transitions. [2021-06-12 21:13:23,885 INFO L78 Accepts]: Start accepts. Automaton has 18201 states and 44249 transitions. Word has length 71 [2021-06-12 21:13:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:13:23,885 INFO L482 AbstractCegarLoop]: Abstraction has 18201 states and 44249 transitions. [2021-06-12 21:13:23,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 18201 states and 44249 transitions. [2021-06-12 21:13:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:13:23,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:13:23,899 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:13:24,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-12 21:13:24,100 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:13:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:13:24,100 INFO L82 PathProgramCache]: Analyzing trace with hash -761922611, now seen corresponding path program 138 times [2021-06-12 21:13:24,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:13:24,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010011957] [2021-06-12 21:13:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:13:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:24,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:13:24,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010011957] [2021-06-12 21:13:24,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010011957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:24,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054226587] [2021-06-12 21:13:24,369 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:24,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 21:13:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:13:24,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-12 21:13:24,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:13:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054226587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:25,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:13:25,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 33] total 54 [2021-06-12 21:13:25,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867734838] [2021-06-12 21:13:25,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-12 21:13:25,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:13:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-12 21:13:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:13:25,448 INFO L87 Difference]: Start difference. First operand 18201 states and 44249 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:13:34,919 INFO L93 Difference]: Finished difference Result 32295 states and 74537 transitions. [2021-06-12 21:13:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-06-12 21:13:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-12 21:13:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:13:34,951 INFO L225 Difference]: With dead ends: 32295 [2021-06-12 21:13:34,951 INFO L226 Difference]: Without dead ends: 32271 [2021-06-12 21:13:34,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17146 ImplicationChecksByTransitivity, 5817.3ms TimeCoverageRelationStatistics Valid=3190, Invalid=46762, Unknown=0, NotChecked=0, Total=49952 [2021-06-12 21:13:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2021-06-12 21:13:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 18835. [2021-06-12 21:13:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18835 states, 18834 states have (on average 2.43320590421578) internal successors, (45827), 18834 states have internal predecessors, (45827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18835 states to 18835 states and 45827 transitions. [2021-06-12 21:13:35,225 INFO L78 Accepts]: Start accepts. Automaton has 18835 states and 45827 transitions. Word has length 71 [2021-06-12 21:13:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:13:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 18835 states and 45827 transitions. [2021-06-12 21:13:35,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 18835 states and 45827 transitions. [2021-06-12 21:13:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:13:35,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:13:35,239 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:13:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:35,440 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:13:35,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:13:35,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1492288521, now seen corresponding path program 139 times [2021-06-12 21:13:35,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:13:35,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834923899] [2021-06-12 21:13:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:13:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:35,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:13:35,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834923899] [2021-06-12 21:13:35,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834923899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:35,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979441678] [2021-06-12 21:13:35,694 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-12 21:13:35,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:13:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 27 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:36,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979441678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:36,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:13:36,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34] total 53 [2021-06-12 21:13:36,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705518907] [2021-06-12 21:13:36,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-12 21:13:36,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:13:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-12 21:13:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2613, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:13:36,742 INFO L87 Difference]: Start difference. First operand 18835 states and 45827 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:13:45,476 INFO L93 Difference]: Finished difference Result 22962 states and 54390 transitions. [2021-06-12 21:13:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-12 21:13:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-12 21:13:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:13:45,494 INFO L225 Difference]: With dead ends: 22962 [2021-06-12 21:13:45,495 INFO L226 Difference]: Without dead ends: 22958 [2021-06-12 21:13:45,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10162 ImplicationChecksByTransitivity, 4770.8ms TimeCoverageRelationStatistics Valid=2219, Invalid=30361, Unknown=0, NotChecked=0, Total=32580 [2021-06-12 21:13:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22958 states. [2021-06-12 21:13:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22958 to 18355. [2021-06-12 21:13:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18355 states, 18354 states have (on average 2.4328756674294434) internal successors, (44653), 18354 states have internal predecessors, (44653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18355 states to 18355 states and 44653 transitions. [2021-06-12 21:13:45,719 INFO L78 Accepts]: Start accepts. Automaton has 18355 states and 44653 transitions. Word has length 71 [2021-06-12 21:13:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:13:45,719 INFO L482 AbstractCegarLoop]: Abstraction has 18355 states and 44653 transitions. [2021-06-12 21:13:45,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:13:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18355 states and 44653 transitions. [2021-06-12 21:13:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:13:45,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:13:45,734 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:13:45,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-06-12 21:13:45,934 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:13:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:13:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash -350033327, now seen corresponding path program 140 times [2021-06-12 21:13:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:13:45,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26419278] [2021-06-12 21:13:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:13:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:13:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:46,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:13:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26419278] [2021-06-12 21:13:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26419278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:46,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350557245] [2021-06-12 21:13:46,221 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:13:46,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:13:46,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:13:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-12 21:13:46,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:13:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 2 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:13:47,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350557245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:13:47,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:13:47,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33] total 55 [2021-06-12 21:13:47,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537685102] [2021-06-12 21:13:47,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-06-12 21:13:47,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:13:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-06-12 21:13:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2813, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:13:47,283 INFO L87 Difference]: Start difference. First operand 18355 states and 44653 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:14:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:14:00,362 INFO L93 Difference]: Finished difference Result 37702 states and 86336 transitions. [2021-06-12 21:14:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-06-12 21:14:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-12 21:14:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:14:00,398 INFO L225 Difference]: With dead ends: 37702 [2021-06-12 21:14:00,399 INFO L226 Difference]: Without dead ends: 37654 [2021-06-12 21:14:00,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30992 ImplicationChecksByTransitivity, 7606.9ms TimeCoverageRelationStatistics Valid=5971, Invalid=77261, Unknown=0, NotChecked=0, Total=83232 [2021-06-12 21:14:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37654 states. [2021-06-12 21:14:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37654 to 18337. [2021-06-12 21:14:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18337 states, 18336 states have (on average 2.4334096858638743) internal successors, (44619), 18336 states have internal predecessors, (44619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:14:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18337 states to 18337 states and 44619 transitions. [2021-06-12 21:14:00,701 INFO L78 Accepts]: Start accepts. Automaton has 18337 states and 44619 transitions. Word has length 71 [2021-06-12 21:14:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:14:00,701 INFO L482 AbstractCegarLoop]: Abstraction has 18337 states and 44619 transitions. [2021-06-12 21:14:00,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:14:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18337 states and 44619 transitions. [2021-06-12 21:14:00,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-12 21:14:00,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:14:00,716 INFO L472 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:14:00,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:14:00,916 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:14:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:14:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2012235221, now seen corresponding path program 141 times [2021-06-12 21:14:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:14:00,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871807934] [2021-06-12 21:14:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:14:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:14:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:14:01,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:14:01,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871807934] [2021-06-12 21:14:01,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871807934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:14:01,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039616059] [2021-06-12 21:14:01,199 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:14:01,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-12 21:14:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:14:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 77 conjunts are in the unsatisfiable core [2021-06-12 21:14:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:14:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 6 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:14:02,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039616059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:14:02,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:14:02,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-06-12 21:14:02,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299473485] [2021-06-12 21:14:02,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-12 21:14:02,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:14:02,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-12 21:14:02,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2905, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:14:02,270 INFO L87 Difference]: Start difference. First operand 18337 states and 44619 transitions. Second operand has 57 states, 57 states have (on average 2.4035087719298245) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-12 21:14:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-06-12 21:14:10,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-12 21:14:10,547 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 21:14:10,549 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:14:10,550 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 21:14:10,550 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:14:10 BasicIcfg [2021-06-12 21:14:10,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:14:10,550 INFO L168 Benchmark]: Toolchain (without parser) took 764280.49 ms. Allocated memory was 155.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 134.8 MB in the beginning and 275.2 MB in the end (delta: -140.4 MB). Peak memory consumption was 873.5 MB. Max. memory is 8.0 GB. [2021-06-12 21:14:10,551 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 155.2 MB. Free memory is still 135.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:14:10,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.10 ms. Allocated memory is still 155.2 MB. Free memory was 134.7 MB in the beginning and 133.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:14:10,551 INFO L168 Benchmark]: Boogie Preprocessor took 12.24 ms. Allocated memory is still 155.2 MB. Free memory was 133.2 MB in the beginning and 132.4 MB in the end (delta: 821.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:14:10,551 INFO L168 Benchmark]: RCFGBuilder took 169.27 ms. Allocated memory is still 155.2 MB. Free memory was 132.2 MB in the beginning and 121.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 21:14:10,551 INFO L168 Benchmark]: TraceAbstraction took 764075.48 ms. Allocated memory was 155.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 120.5 MB in the beginning and 275.2 MB in the end (delta: -154.7 MB). Peak memory consumption was 858.8 MB. Max. memory is 8.0 GB. [2021-06-12 21:14:10,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 155.2 MB. Free memory is still 135.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.10 ms. Allocated memory is still 155.2 MB. Free memory was 134.7 MB in the beginning and 133.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.24 ms. Allocated memory is still 155.2 MB. Free memory was 133.2 MB in the beginning and 132.4 MB in the end (delta: 821.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 169.27 ms. Allocated memory is still 155.2 MB. Free memory was 132.2 MB in the beginning and 121.0 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 764075.48 ms. Allocated memory was 155.2 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 120.5 MB in the beginning and 275.2 MB in the end (delta: -154.7 MB). Peak memory consumption was 858.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (18337states) and FLOYD_HOARE automaton (currently 164 states, 57 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 216 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 764020.3ms, OverallIterations: 143, TraceHistogramMax: 14, EmptinessCheckTime: 626.8ms, AutomataDifference: 621176.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9166 SDtfs, 75722 SDslu, 163027 SDs, 0 SdLazy, 476885 SolverSat, 23379 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 154413.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26538 GetRequests, 4857 SyntacticMatches, 93 SemanticMatches, 21587 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795795 ImplicationChecksByTransitivity, 483264.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18835occurred in iteration=140, InterpolantAutomatonStates: 17058, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10973.1ms AutomataMinimizationTime, 142 MinimizatonAttempts, 881684 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 551.1ms SsaConstructionTime, 2793.9ms SatisfiabilityAnalysisTime, 95976.8ms InterpolantComputationTime, 14110 NumberOfCodeBlocks, 14110 NumberOfCodeBlocksAsserted, 1044 NumberOfCheckSat, 13826 ConstructedInterpolants, 0 QuantifiedInterpolants, 128219 SizeOfPredicates, 528 NumberOfNonLiveVariables, 16399 ConjunctsInSsa, 6166 ConjunctsInUnsatCore, 284 InterpolantComputations, 2 PerfectInterpolantSequences, 8486/50045 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown