/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:53:12,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:53:12,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:53:12,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 03:53:12,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 03:53:12,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 03:53:12,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 03:53:12,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 03:53:12,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 03:53:12,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 03:53:12,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 03:53:12,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 03:53:12,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 03:53:12,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 03:53:12,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 03:53:12,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 03:53:12,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 03:53:12,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 03:53:12,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 03:53:12,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 03:53:12,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 03:53:12,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 03:53:12,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 03:53:12,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 03:53:12,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 03:53:12,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 03:53:12,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 03:53:12,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 03:53:12,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 03:53:12,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 03:53:12,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 03:53:12,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 03:53:12,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 03:53:12,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 03:53:12,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 03:53:12,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 03:53:12,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 03:53:12,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 03:53:12,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 03:53:12,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 03:53:12,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 03:53:12,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 03:53:12,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:53:12,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:53:12,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:53:12,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:53:12,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:53:12,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:53:12,495 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:53:12,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:53:12,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:53:12,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:53:12,497 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:53:12,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:53:12,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:53:12,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:53:12,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:53:12,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:53:12,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:53:12,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:53:12,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:53:12,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:53:12,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:53:12,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:53:12,499 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:53:12,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:53:12,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:53:12,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:53:12,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:53:12,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:53:12,821 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:53:12,822 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:53:12,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-06-05 03:53:12,823 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-06-05 03:53:12,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:53:12,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:53:12,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:53:12,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:53:12,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:53:12,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:53:12,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:53:12,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:53:12,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:53:12,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... [2021-06-05 03:53:12,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:53:12,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:53:12,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:53:12,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:53:12,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:53:12,981 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 03:53:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 03:53:12,981 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 03:53:12,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 03:53:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 03:53:12,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 03:53:12,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:53:12,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:53:12,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:53:12,983 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:53:13,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:53:13,129 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:53:13,130 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:53:13 BoogieIcfgContainer [2021-06-05 03:53:13,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:53:13,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:53:13,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:53:13,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:53:13,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:53:12" (1/2) ... [2021-06-05 03:53:13,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4da6cf and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:53:13, skipping insertion in model container [2021-06-05 03:53:13,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:53:13" (2/2) ... [2021-06-05 03:53:13,136 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-06-05 03:53:13,141 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:53:13,141 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:53:13,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:53:13,142 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:53:13,165 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 03:53:13,182 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 03:53:13,197 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:53:13,198 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:53:13,198 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:53:13,198 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:53:13,198 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:53:13,198 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:53:13,198 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:53:13,198 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:53:13,205 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-05 03:53:13,214 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 03:53:13,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:13,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:13,222 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash -538755822, now seen corresponding path program 1 times [2021-06-05 03:53:13,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:13,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317199756] [2021-06-05 03:53:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:13,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317199756] [2021-06-05 03:53:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317199756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:53:13,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:53:13,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:53:13,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274662621] [2021-06-05 03:53:13,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:53:13,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:13,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:53:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:53:13,439 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:13,470 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-05 03:53:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:53:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 03:53:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:13,479 INFO L225 Difference]: With dead ends: 54 [2021-06-05 03:53:13,479 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 03:53:13,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:53:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 03:53:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 03:53:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 03:53:13,520 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-05 03:53:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:13,521 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 03:53:13,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 03:53:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 03:53:13,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:13,524 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:13,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:53:13,524 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1263691540, now seen corresponding path program 1 times [2021-06-05 03:53:13,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:13,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093787635] [2021-06-05 03:53:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:13,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093787635] [2021-06-05 03:53:13,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093787635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273037113] [2021-06-05 03:53:13,767 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 [2021-06-05 03:53:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273037113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:13,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:13,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 03:53:13,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923730672] [2021-06-05 03:53:13,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:53:13,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:53:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:53:13,962 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:14,082 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-06-05 03:53:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:53:14,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 03:53:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:14,084 INFO L225 Difference]: With dead ends: 65 [2021-06-05 03:53:14,085 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 03:53:14,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 03:53:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-06-05 03:53:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-06-05 03:53:14,097 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-06-05 03:53:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:14,098 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-06-05 03:53:14,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-06-05 03:53:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 03:53:14,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:14,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:14,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 03:53:14,317 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:14,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1006944620, now seen corresponding path program 1 times [2021-06-05 03:53:14,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:14,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229047179] [2021-06-05 03:53:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:14,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:14,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229047179] [2021-06-05 03:53:14,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229047179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615544639] [2021-06-05 03:53:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:14,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615544639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:14,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 03:53:14,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573523572] [2021-06-05 03:53:14,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:53:14,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:53:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:53:14,548 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 03:53:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:14,587 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-06-05 03:53:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:53:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 13 [2021-06-05 03:53:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:14,589 INFO L225 Difference]: With dead ends: 52 [2021-06-05 03:53:14,589 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 03:53:14,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:53:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 03:53:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-06-05 03:53:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 03:53:14,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-06-05 03:53:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:14,601 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 03:53:14,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-05 03:53:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 03:53:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 03:53:14,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:14,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:14,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:14,825 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash 689628820, now seen corresponding path program 2 times [2021-06-05 03:53:14,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:14,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709814497] [2021-06-05 03:53:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:14,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:14,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709814497] [2021-06-05 03:53:14,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709814497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:14,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667567070] [2021-06-05 03:53:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:14,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:14,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:14,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 03:53:14,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:15,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667567070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:15,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 03:53:15,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477157894] [2021-06-05 03:53:15,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:53:15,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:15,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:53:15,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:53:15,044 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:15,138 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-06-05 03:53:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:53:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 03:53:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:15,139 INFO L225 Difference]: With dead ends: 64 [2021-06-05 03:53:15,139 INFO L226 Difference]: Without dead ends: 53 [2021-06-05 03:53:15,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-05 03:53:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-06-05 03:53:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 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) [2021-06-05 03:53:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-06-05 03:53:15,143 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-06-05 03:53:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:15,143 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-06-05 03:53:15,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-06-05 03:53:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:15,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:15,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:15,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:15,360 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:15,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1751181162, now seen corresponding path program 2 times [2021-06-05 03:53:15,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:15,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078119270] [2021-06-05 03:53:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:15,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078119270] [2021-06-05 03:53:15,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078119270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504369221] [2021-06-05 03:53:15,475 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 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 [2021-06-05 03:53:15,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:15,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:53:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:15,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504369221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:15,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:15,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:53:15,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014247136] [2021-06-05 03:53:15,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:15,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:15,619 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:15,778 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-06-05 03:53:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:53:15,779 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:15,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:15,781 INFO L225 Difference]: With dead ends: 73 [2021-06-05 03:53:15,781 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 03:53:15,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 03:53:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-06-05 03:53:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-06-05 03:53:15,790 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-06-05 03:53:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:15,790 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-06-05 03:53:15,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-06-05 03:53:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:15,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:15,795 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:16,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:16,012 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 273149974, now seen corresponding path program 1 times [2021-06-05 03:53:16,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:16,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347069369] [2021-06-05 03:53:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:16,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:16,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347069369] [2021-06-05 03:53:16,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347069369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667294538] [2021-06-05 03:53:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667294538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:16,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:53:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331217425] [2021-06-05 03:53:16,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:16,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:16,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:16,440 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:16,638 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-06-05 03:53:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:16,640 INFO L225 Difference]: With dead ends: 69 [2021-06-05 03:53:16,640 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 03:53:16,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 03:53:16,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-06-05 03:53:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-06-05 03:53:16,649 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-06-05 03:53:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:16,649 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-06-05 03:53:16,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-06-05 03:53:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:16,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:16,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:16,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 03:53:16,870 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash -109570414, now seen corresponding path program 2 times [2021-06-05 03:53:16,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:16,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798524543] [2021-06-05 03:53:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:16,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798524543] [2021-06-05 03:53:16,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798524543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801732011] [2021-06-05 03:53:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:17,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:17,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:17,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:17,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801732011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:17,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:53:17,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487196386] [2021-06-05 03:53:17,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:17,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:17,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:17,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:17,249 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:17,394 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-06-05 03:53:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:17,408 INFO L225 Difference]: With dead ends: 73 [2021-06-05 03:53:17,408 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 03:53:17,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 03:53:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-06-05 03:53:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-06-05 03:53:17,412 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-06-05 03:53:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:17,413 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-06-05 03:53:17,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-06-05 03:53:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:17,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:17,413 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:17,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:17,614 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1969723414, now seen corresponding path program 3 times [2021-06-05 03:53:17,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:17,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510543734] [2021-06-05 03:53:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:17,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:17,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510543734] [2021-06-05 03:53:17,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510543734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398419872] [2021-06-05 03:53:17,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:17,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:53:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:17,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398419872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:17,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:17,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:53:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132911619] [2021-06-05 03:53:17,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:17,970 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:18,186 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-06-05 03:53:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:18,187 INFO L225 Difference]: With dead ends: 94 [2021-06-05 03:53:18,187 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 03:53:18,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 03:53:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-06-05 03:53:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-06-05 03:53:18,191 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-06-05 03:53:18,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:18,191 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-06-05 03:53:18,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-06-05 03:53:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:18,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:18,192 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:18,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,411 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1985184210, now seen corresponding path program 4 times [2021-06-05 03:53:18,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:18,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435346788] [2021-06-05 03:53:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:18,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:18,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435346788] [2021-06-05 03:53:18,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435346788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235186869] [2021-06-05 03:53:18,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:18,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:18,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:18,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235186869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:18,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:18,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:53:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867478623] [2021-06-05 03:53:18,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:18,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:18,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:18,797 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:18,967 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-06-05 03:53:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:18,969 INFO L225 Difference]: With dead ends: 81 [2021-06-05 03:53:18,969 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 03:53:18,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 03:53:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-06-05 03:53:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-06-05 03:53:18,974 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-06-05 03:53:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:18,974 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-06-05 03:53:18,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-06-05 03:53:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:18,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:18,975 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:19,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-06-05 03:53:19,176 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 903122118, now seen corresponding path program 5 times [2021-06-05 03:53:19,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:19,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792498613] [2021-06-05 03:53:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:19,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792498613] [2021-06-05 03:53:19,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792498613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546671757] [2021-06-05 03:53:19,300 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 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 [2021-06-05 03:53:19,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:19,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:19,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546671757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:19,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:19,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838973560] [2021-06-05 03:53:19,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:19,497 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:19,604 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-06-05 03:53:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:19,605 INFO L225 Difference]: With dead ends: 72 [2021-06-05 03:53:19,606 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 03:53:19,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 03:53:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-06-05 03:53:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 03:53:19,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-05 03:53:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:19,610 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 03:53:19,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 03:53:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:19,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:19,611 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:19,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:19,835 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1312551350, now seen corresponding path program 6 times [2021-06-05 03:53:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:19,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339689193] [2021-06-05 03:53:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:19,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:19,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339689193] [2021-06-05 03:53:19,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339689193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:19,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992475299] [2021-06-05 03:53:19,920 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:19,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:53:19,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992475299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:20,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042743406] [2021-06-05 03:53:20,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:20,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:20,103 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:20,262 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-06-05 03:53:20,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:20,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:20,263 INFO L225 Difference]: With dead ends: 95 [2021-06-05 03:53:20,263 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 03:53:20,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 03:53:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-06-05 03:53:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 03:53:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 03:53:20,266 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 03:53:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:20,267 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 03:53:20,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 03:53:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:20,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:20,267 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:20,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:20,490 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:20,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1297090554, now seen corresponding path program 7 times [2021-06-05 03:53:20,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:20,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503042954] [2021-06-05 03:53:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:20,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:20,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503042954] [2021-06-05 03:53:20,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503042954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240248566] [2021-06-05 03:53:20,576 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:20,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240248566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:20,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:20,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:20,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615100177] [2021-06-05 03:53:20,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:20,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:20,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:20,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:20,738 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:20,877 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-06-05 03:53:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:20,878 INFO L225 Difference]: With dead ends: 82 [2021-06-05 03:53:20,878 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 03:53:20,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 03:53:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-06-05 03:53:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 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) [2021-06-05 03:53:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-06-05 03:53:20,881 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-06-05 03:53:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:20,881 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-06-05 03:53:20,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-06-05 03:53:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:20,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:20,882 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:21,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 03:53:21,097 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash 833619410, now seen corresponding path program 8 times [2021-06-05 03:53:21,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:21,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618710461] [2021-06-05 03:53:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:21,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618710461] [2021-06-05 03:53:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618710461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053677924] [2021-06-05 03:53:21,182 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:21,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:21,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053677924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:21,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:21,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971694527] [2021-06-05 03:53:21,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:21,362 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:21,520 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-06-05 03:53:21,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:21,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:21,522 INFO L225 Difference]: With dead ends: 92 [2021-06-05 03:53:21,522 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 03:53:21,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 03:53:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-06-05 03:53:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 03:53:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 03:53:21,528 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 03:53:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:21,529 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 03:53:21,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 03:53:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:21,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:21,533 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:21,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 03:53:21,749 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash 849080206, now seen corresponding path program 9 times [2021-06-05 03:53:21,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:21,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880438684] [2021-06-05 03:53:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:21,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:21,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880438684] [2021-06-05 03:53:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880438684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111815538] [2021-06-05 03:53:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:21,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:21,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:21,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:21,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111815538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:21,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:21,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:21,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425831844] [2021-06-05 03:53:21,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:21,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:21,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:21,965 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:22,125 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 03:53:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:22,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:22,126 INFO L225 Difference]: With dead ends: 98 [2021-06-05 03:53:22,126 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 03:53:22,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 03:53:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-06-05 03:53:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 03:53:22,129 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-06-05 03:53:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:22,129 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 03:53:22,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 03:53:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:22,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:22,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:22,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 03:53:22,331 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1420535012, now seen corresponding path program 10 times [2021-06-05 03:53:22,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:22,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770490333] [2021-06-05 03:53:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:22,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:22,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770490333] [2021-06-05 03:53:22,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770490333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188053790] [2021-06-05 03:53:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:22,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:22,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:22,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188053790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:22,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:22,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955776736] [2021-06-05 03:53:22,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:22,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:22,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:22,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:22,588 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:22,699 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-06-05 03:53:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:22,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:22,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:22,700 INFO L225 Difference]: With dead ends: 75 [2021-06-05 03:53:22,700 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 03:53:22,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 03:53:22,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-06-05 03:53:22,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 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) [2021-06-05 03:53:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-05 03:53:22,703 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-05 03:53:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:22,703 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-05 03:53:22,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-05 03:53:22,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:22,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:22,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:22,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:22,913 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:22,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1788920398, now seen corresponding path program 11 times [2021-06-05 03:53:22,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:22,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273882665] [2021-06-05 03:53:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:22,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:22,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273882665] [2021-06-05 03:53:22,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273882665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:22,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65336694] [2021-06-05 03:53:22,987 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:23,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:23,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:23,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:23,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65336694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:23,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:23,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935954730] [2021-06-05 03:53:23,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:23,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:23,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:23,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:23,143 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:23,277 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-06-05 03:53:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:23,278 INFO L225 Difference]: With dead ends: 76 [2021-06-05 03:53:23,278 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 03:53:23,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 03:53:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-06-05 03:53:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-06-05 03:53:23,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-06-05 03:53:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:23,281 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-06-05 03:53:23,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-06-05 03:53:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:23,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:23,281 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:23,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 03:53:23,501 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -426753070, now seen corresponding path program 12 times [2021-06-05 03:53:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:23,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762195239] [2021-06-05 03:53:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:23,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:23,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762195239] [2021-06-05 03:53:23,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762195239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460620527] [2021-06-05 03:53:23,590 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:23,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:23,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460620527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:23,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:23,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:23,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231739448] [2021-06-05 03:53:23,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:23,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:23,776 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:23,944 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-06-05 03:53:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:23,945 INFO L225 Difference]: With dead ends: 99 [2021-06-05 03:53:23,945 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 03:53:23,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 03:53:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-05 03:53:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 03:53:23,948 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 03:53:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:23,948 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 03:53:23,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 03:53:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:23,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:23,949 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:24,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 03:53:24,161 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash -411292274, now seen corresponding path program 13 times [2021-06-05 03:53:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:24,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803970499] [2021-06-05 03:53:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:24,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803970499] [2021-06-05 03:53:24,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803970499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449318203] [2021-06-05 03:53:24,231 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449318203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:24,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603475835] [2021-06-05 03:53:24,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:24,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:24,383 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:24,517 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-06-05 03:53:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:24,518 INFO L225 Difference]: With dead ends: 86 [2021-06-05 03:53:24,518 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 03:53:24,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 03:53:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-06-05 03:53:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-06-05 03:53:24,520 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-06-05 03:53:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:24,521 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-06-05 03:53:24,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-06-05 03:53:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:24,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:24,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:24,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 03:53:24,722 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1719417690, now seen corresponding path program 14 times [2021-06-05 03:53:24,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:24,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371095342] [2021-06-05 03:53:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:24,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:24,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371095342] [2021-06-05 03:53:24,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371095342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258302202] [2021-06-05 03:53:24,807 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:24,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:24,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:24,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258302202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:24,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:24,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721325417] [2021-06-05 03:53:24,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:24,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:24,950 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:25,084 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-06-05 03:53:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:25,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:25,085 INFO L225 Difference]: With dead ends: 96 [2021-06-05 03:53:25,085 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 03:53:25,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 03:53:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-06-05 03:53:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-06-05 03:53:25,087 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-06-05 03:53:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:25,088 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-06-05 03:53:25,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-06-05 03:53:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:25,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:25,088 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:25,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:25,310 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1734878486, now seen corresponding path program 15 times [2021-06-05 03:53:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:25,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290842201] [2021-06-05 03:53:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:25,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:25,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290842201] [2021-06-05 03:53:25,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290842201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118089313] [2021-06-05 03:53:25,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:25,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:53:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:25,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118089313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:25,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:25,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172472120] [2021-06-05 03:53:25,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:25,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:25,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:25,545 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:25,680 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 03:53:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:25,681 INFO L225 Difference]: With dead ends: 102 [2021-06-05 03:53:25,681 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 03:53:25,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 03:53:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-06-05 03:53:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-06-05 03:53:25,683 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-06-05 03:53:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:25,684 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-06-05 03:53:25,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-06-05 03:53:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:25,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:25,684 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:25,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:25,897 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1988634004, now seen corresponding path program 16 times [2021-06-05 03:53:25,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:25,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061646421] [2021-06-05 03:53:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:25,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:25,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061646421] [2021-06-05 03:53:25,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061646421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:25,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376016898] [2021-06-05 03:53:25,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:26,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:26,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376016898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:26,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 03:53:26,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35467429] [2021-06-05 03:53:26,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:53:26,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:53:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:53:26,111 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:26,230 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-06-05 03:53:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:26,231 INFO L225 Difference]: With dead ends: 79 [2021-06-05 03:53:26,231 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 03:53:26,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 03:53:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-06-05 03:53:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 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) [2021-06-05 03:53:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-05 03:53:26,234 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-05 03:53:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:26,234 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-05 03:53:26,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-05 03:53:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:26,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:26,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 03:53:26,453 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 625326102, now seen corresponding path program 17 times [2021-06-05 03:53:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:26,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701601549] [2021-06-05 03:53:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:26,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701601549] [2021-06-05 03:53:26,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701601549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787292376] [2021-06-05 03:53:26,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:26,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:26,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:26,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787292376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:26,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:26,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 03:53:26,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141636544] [2021-06-05 03:53:26,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:26,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:26,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:26,693 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:26,898 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-06-05 03:53:26,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:26,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:26,899 INFO L225 Difference]: With dead ends: 99 [2021-06-05 03:53:26,899 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 03:53:26,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 03:53:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-06-05 03:53:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-06-05 03:53:26,902 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-06-05 03:53:26,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:26,902 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-06-05 03:53:26,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:26,902 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-06-05 03:53:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:26,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:26,902 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:27,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 03:53:27,113 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash 640786898, now seen corresponding path program 18 times [2021-06-05 03:53:27,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:27,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711124190] [2021-06-05 03:53:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711124190] [2021-06-05 03:53:27,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711124190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269329843] [2021-06-05 03:53:27,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:53:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269329843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:27,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 03:53:27,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635113682] [2021-06-05 03:53:27,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:27,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:27,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:27,368 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:27,551 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-05 03:53:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:27,552 INFO L225 Difference]: With dead ends: 105 [2021-06-05 03:53:27,552 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 03:53:27,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 218.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 03:53:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-06-05 03:53:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-06-05 03:53:27,558 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-06-05 03:53:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:27,559 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-06-05 03:53:27,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-06-05 03:53:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:27,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:27,559 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:27,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,773 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1212241704, now seen corresponding path program 19 times [2021-06-05 03:53:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:27,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613556599] [2021-06-05 03:53:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:27,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:27,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613556599] [2021-06-05 03:53:27,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613556599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:27,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724113593] [2021-06-05 03:53:27,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:27,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:28,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724113593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:28,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 03:53:28,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227722194] [2021-06-05 03:53:28,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:28,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:28,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:28,010 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:28,132 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-06-05 03:53:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:28,133 INFO L225 Difference]: With dead ends: 85 [2021-06-05 03:53:28,133 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 03:53:28,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 03:53:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-06-05 03:53:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 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) [2021-06-05 03:53:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-06-05 03:53:28,135 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-06-05 03:53:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:28,135 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-06-05 03:53:28,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-06-05 03:53:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:28,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:28,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:28,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 03:53:28,349 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 51263382, now seen corresponding path program 3 times [2021-06-05 03:53:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:28,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204903009] [2021-06-05 03:53:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:28,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:28,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204903009] [2021-06-05 03:53:28,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204903009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288014523] [2021-06-05 03:53:28,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:28,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:28,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:28,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 03:53:28,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:28,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288014523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:28,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:53:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785562711] [2021-06-05 03:53:28,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:53:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:28,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:53:28,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:53:28,514 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:28,630 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-06-05 03:53:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:53:28,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:28,631 INFO L225 Difference]: With dead ends: 92 [2021-06-05 03:53:28,631 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 03:53:28,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:53:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 03:53:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 03:53:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-06-05 03:53:28,633 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-06-05 03:53:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:28,633 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-06-05 03:53:28,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-06-05 03:53:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:53:28,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:28,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:28,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:28,837 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:28,837 INFO L82 PathProgramCache]: Analyzing trace with hash 674386126, now seen corresponding path program 20 times [2021-06-05 03:53:28,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:28,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436567501] [2021-06-05 03:53:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:28,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:28,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436567501] [2021-06-05 03:53:28,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436567501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:28,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583046020] [2021-06-05 03:53:28,921 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:28,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:28,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:53:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:29,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583046020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:29,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:29,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 03:53:29,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064480999] [2021-06-05 03:53:29,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:53:29,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:53:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:53:29,070 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:29,201 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 03:53:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:53:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:53:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:29,202 INFO L225 Difference]: With dead ends: 86 [2021-06-05 03:53:29,202 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 03:53:29,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 03:53:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-05 03:53:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-06-05 03:53:29,204 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-06-05 03:53:29,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:29,204 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-06-05 03:53:29,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-06-05 03:53:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:29,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:29,205 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:29,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 03:53:29,421 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash 59077016, now seen corresponding path program 3 times [2021-06-05 03:53:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:29,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323727797] [2021-06-05 03:53:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:29,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:29,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323727797] [2021-06-05 03:53:29,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323727797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:29,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843072245] [2021-06-05 03:53:29,505 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:29,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:53:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:29,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843072245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:29,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:29,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 03:53:29,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013163465] [2021-06-05 03:53:29,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:53:29,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:53:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:53:29,623 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:29,810 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-06-05 03:53:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:53:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:29,811 INFO L225 Difference]: With dead ends: 97 [2021-06-05 03:53:29,811 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 03:53:29,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:53:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 03:53:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-06-05 03:53:29,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-05 03:53:29,813 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-05 03:53:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:29,813 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-05 03:53:29,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-05 03:53:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:29,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:29,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:30,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:53:30,025 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2083408152, now seen corresponding path program 21 times [2021-06-05 03:53:30,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562660233] [2021-06-05 03:53:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:30,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562660233] [2021-06-05 03:53:30,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562660233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846663080] [2021-06-05 03:53:30,127 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 [2021-06-05 03:53:30,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:30,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:30,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846663080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:30,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:30,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:30,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596384898] [2021-06-05 03:53:30,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:30,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:30,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:30,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:30,371 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:30,719 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-06-05 03:53:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:30,720 INFO L225 Difference]: With dead ends: 99 [2021-06-05 03:53:30,720 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 03:53:30,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 03:53:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-06-05 03:53:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-05 03:53:30,723 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-05 03:53:30,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:30,723 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-05 03:53:30,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:30,723 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-05 03:53:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:30,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:30,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:30,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 03:53:30,937 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1700687764, now seen corresponding path program 22 times [2021-06-05 03:53:30,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:30,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666167420] [2021-06-05 03:53:30,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:31,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666167420] [2021-06-05 03:53:31,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666167420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303582449] [2021-06-05 03:53:31,028 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 [2021-06-05 03:53:31,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:31,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:31,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303582449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:31,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:31,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406438767] [2021-06-05 03:53:31,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:31,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:31,229 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:31,460 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-06-05 03:53:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:31,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:31,461 INFO L225 Difference]: With dead ends: 104 [2021-06-05 03:53:31,461 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 03:53:31,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 03:53:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-06-05 03:53:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 03:53:31,464 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 03:53:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:31,464 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 03:53:31,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 03:53:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:31,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:31,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:31,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 03:53:31,669 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash -514985704, now seen corresponding path program 23 times [2021-06-05 03:53:31,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:31,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222886703] [2021-06-05 03:53:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:31,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:31,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222886703] [2021-06-05 03:53:31,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222886703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:31,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051228217] [2021-06-05 03:53:31,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:31,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:31,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:31,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:31,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051228217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:32,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:32,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557079261] [2021-06-05 03:53:32,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:32,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:32,011 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:32,383 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-06-05 03:53:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:32,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:32,384 INFO L225 Difference]: With dead ends: 130 [2021-06-05 03:53:32,384 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 03:53:32,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 03:53:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-06-05 03:53:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 03:53:32,387 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 03:53:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:32,387 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 03:53:32,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 03:53:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:32,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:32,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:32,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:32,610 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:32,611 INFO L82 PathProgramCache]: Analyzing trace with hash -499524908, now seen corresponding path program 24 times [2021-06-05 03:53:32,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:32,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673407768] [2021-06-05 03:53:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:32,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673407768] [2021-06-05 03:53:32,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673407768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996017691] [2021-06-05 03:53:32,707 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 [2021-06-05 03:53:32,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:32,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:32,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:32,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996017691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:32,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:32,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365621991] [2021-06-05 03:53:32,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:32,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:32,943 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,210 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 03:53:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,210 INFO L225 Difference]: With dead ends: 113 [2021-06-05 03:53:33,210 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 03:53:33,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:33,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 03:53:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-06-05 03:53:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-05 03:53:33,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-06-05 03:53:33,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,213 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-05 03:53:33,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-05 03:53:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,213 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:33,417 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1651089708, now seen corresponding path program 25 times [2021-06-05 03:53:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373385837] [2021-06-05 03:53:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:33,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373385837] [2021-06-05 03:53:33,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373385837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:33,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47683443] [2021-06-05 03:53:33,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:33,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:33,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:33,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47683443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:33,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:33,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:33,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230161848] [2021-06-05 03:53:33,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:33,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:33,728 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:33,980 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-06-05 03:53:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:33,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:33,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:33,980 INFO L225 Difference]: With dead ends: 124 [2021-06-05 03:53:33,980 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 03:53:33,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 03:53:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-06-05 03:53:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 03:53:33,983 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 03:53:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:33,983 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 03:53:33,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 03:53:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:33,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:33,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:34,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:34,189 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1635628912, now seen corresponding path program 26 times [2021-06-05 03:53:34,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:34,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243749721] [2021-06-05 03:53:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:34,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243749721] [2021-06-05 03:53:34,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243749721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048161888] [2021-06-05 03:53:34,286 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 [2021-06-05 03:53:34,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:34,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:34,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:34,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048161888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:34,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:34,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:34,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247767110] [2021-06-05 03:53:34,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:34,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:34,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:34,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:34,513 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:34,791 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-06-05 03:53:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:34,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:34,792 INFO L225 Difference]: With dead ends: 127 [2021-06-05 03:53:34,792 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 03:53:34,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 03:53:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-06-05 03:53:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-05 03:53:34,799 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-06-05 03:53:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:34,799 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-05 03:53:34,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-05 03:53:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:34,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:34,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:35,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 03:53:35,013 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:35,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1064174106, now seen corresponding path program 27 times [2021-06-05 03:53:35,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:35,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139292495] [2021-06-05 03:53:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:35,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139292495] [2021-06-05 03:53:35,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139292495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034750964] [2021-06-05 03:53:35,106 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 [2021-06-05 03:53:35,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:53:35,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:35,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034750964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:35,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034497294] [2021-06-05 03:53:35,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:35,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:35,282 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:35,440 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-06-05 03:53:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:53:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:35,441 INFO L225 Difference]: With dead ends: 96 [2021-06-05 03:53:35,441 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 03:53:35,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:53:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 03:53:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-06-05 03:53:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-06-05 03:53:35,443 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-06-05 03:53:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:35,443 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-06-05 03:53:35,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-06-05 03:53:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:35,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:35,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:35,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:35,644 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444760, now seen corresponding path program 28 times [2021-06-05 03:53:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797325011] [2021-06-05 03:53:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:35,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797325011] [2021-06-05 03:53:35,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797325011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417095425] [2021-06-05 03:53:35,750 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 [2021-06-05 03:53:35,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:35,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:35,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417095425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:35,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:35,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:35,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217183182] [2021-06-05 03:53:35,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:35,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:35,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:35,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:35,959 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:36,421 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-06-05 03:53:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:36,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 03:53:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:36,422 INFO L225 Difference]: With dead ends: 112 [2021-06-05 03:53:36,422 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 03:53:36,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:53:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 03:53:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-06-05 03:53:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-06-05 03:53:36,424 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-06-05 03:53:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:36,424 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-06-05 03:53:36,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:36,424 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-06-05 03:53:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:36,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:36,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:36,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 03:53:36,633 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash -695788720, now seen corresponding path program 29 times [2021-06-05 03:53:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:36,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785461275] [2021-06-05 03:53:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:36,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:36,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785461275] [2021-06-05 03:53:36,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785461275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:36,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910571132] [2021-06-05 03:53:36,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:36,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:36,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:36,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910571132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:36,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:36,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:36,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91212480] [2021-06-05 03:53:36,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:36,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:36,929 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:37,147 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-06-05 03:53:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:37,147 INFO L225 Difference]: With dead ends: 95 [2021-06-05 03:53:37,148 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 03:53:37,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 03:53:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-06-05 03:53:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 03:53:37,150 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-06-05 03:53:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:37,150 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 03:53:37,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 03:53:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:37,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:37,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:37,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:37,357 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1383505108, now seen corresponding path program 30 times [2021-06-05 03:53:37,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:37,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324924298] [2021-06-05 03:53:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:37,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:37,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324924298] [2021-06-05 03:53:37,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324924298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804236169] [2021-06-05 03:53:37,470 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 [2021-06-05 03:53:37,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:37,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:37,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804236169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:37,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:37,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:37,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914160101] [2021-06-05 03:53:37,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:37,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:37,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:37,667 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:37,921 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-06-05 03:53:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:37,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:37,922 INFO L225 Difference]: With dead ends: 136 [2021-06-05 03:53:37,922 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 03:53:37,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 03:53:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-06-05 03:53:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 03:53:37,925 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 03:53:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:37,925 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 03:53:37,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 03:53:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:37,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:37,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 03:53:38,133 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1398965904, now seen corresponding path program 31 times [2021-06-05 03:53:38,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768358394] [2021-06-05 03:53:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:38,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768358394] [2021-06-05 03:53:38,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768358394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280875250] [2021-06-05 03:53:38,231 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) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:38,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:38,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:38,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280875250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:38,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:38,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:38,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477220171] [2021-06-05 03:53:38,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:38,463 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:38,773 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-06-05 03:53:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:38,774 INFO L225 Difference]: With dead ends: 122 [2021-06-05 03:53:38,774 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 03:53:38,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:53:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 03:53:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-06-05 03:53:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-06-05 03:53:38,777 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-06-05 03:53:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:38,777 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-06-05 03:53:38,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-06-05 03:53:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:38,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:38,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:38,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 03:53:38,997 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:38,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -765291428, now seen corresponding path program 32 times [2021-06-05 03:53:38,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:38,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038846271] [2021-06-05 03:53:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038846271] [2021-06-05 03:53:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038846271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790675160] [2021-06-05 03:53:39,116 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 [2021-06-05 03:53:39,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:39,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:39,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790675160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:39,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517621] [2021-06-05 03:53:39,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:39,309 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:39,614 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-06-05 03:53:39,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:39,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:39,615 INFO L225 Difference]: With dead ends: 134 [2021-06-05 03:53:39,615 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 03:53:39,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 03:53:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-06-05 03:53:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 03:53:39,617 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 03:53:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:39,617 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 03:53:39,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 03:53:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:39,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:39,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:39,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:53:39,818 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:39,819 INFO L82 PathProgramCache]: Analyzing trace with hash -749830632, now seen corresponding path program 33 times [2021-06-05 03:53:39,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:39,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970175601] [2021-06-05 03:53:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:39,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:39,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970175601] [2021-06-05 03:53:39,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970175601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:39,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409796454] [2021-06-05 03:53:39,902 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 [2021-06-05 03:53:39,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:39,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409796454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:40,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:40,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408664896] [2021-06-05 03:53:40,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:40,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:40,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:40,087 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:40,513 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-06-05 03:53:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:40,514 INFO L225 Difference]: With dead ends: 145 [2021-06-05 03:53:40,514 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 03:53:40,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:53:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 03:53:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-06-05 03:53:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 03:53:40,517 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-06-05 03:53:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:40,517 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 03:53:40,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 03:53:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:40,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:40,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:40,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:53:40,729 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:40,729 INFO L82 PathProgramCache]: Analyzing trace with hash -178375826, now seen corresponding path program 34 times [2021-06-05 03:53:40,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:40,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394441517] [2021-06-05 03:53:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:40,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:40,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394441517] [2021-06-05 03:53:40,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394441517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:40,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897915346] [2021-06-05 03:53:40,813 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 [2021-06-05 03:53:40,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:40,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:40,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:40,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897915346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:41,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:41,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061541161] [2021-06-05 03:53:41,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:41,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:41,007 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:41,267 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-06-05 03:53:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:41,268 INFO L225 Difference]: With dead ends: 105 [2021-06-05 03:53:41,268 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 03:53:41,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 03:53:41,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-06-05 03:53:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-06-05 03:53:41,270 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-06-05 03:53:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:41,271 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-06-05 03:53:41,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-06-05 03:53:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:41,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:41,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:41,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:41,485 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1859383016, now seen corresponding path program 35 times [2021-06-05 03:53:41,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:41,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38267659] [2021-06-05 03:53:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38267659] [2021-06-05 03:53:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38267659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072003250] [2021-06-05 03:53:41,569 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 [2021-06-05 03:53:41,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:41,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:41,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072003250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:41,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:41,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749108610] [2021-06-05 03:53:41,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:41,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:41,782 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:42,179 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-06-05 03:53:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:42,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:42,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:42,180 INFO L225 Difference]: With dead ends: 154 [2021-06-05 03:53:42,180 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 03:53:42,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 03:53:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-06-05 03:53:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-06-05 03:53:42,182 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-06-05 03:53:42,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:42,183 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-06-05 03:53:42,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-06-05 03:53:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:42,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:42,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:42,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 03:53:42,397 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1843922220, now seen corresponding path program 36 times [2021-06-05 03:53:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:42,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267561678] [2021-06-05 03:53:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:42,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267561678] [2021-06-05 03:53:42,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267561678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:42,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978734450] [2021-06-05 03:53:42,522 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 [2021-06-05 03:53:42,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978734450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:42,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:42,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:42,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352135126] [2021-06-05 03:53:42,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:42,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:42,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:42,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:42,779 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:43,243 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-06-05 03:53:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:43,244 INFO L225 Difference]: With dead ends: 168 [2021-06-05 03:53:43,244 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 03:53:43,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 480.5ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 03:53:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-06-05 03:53:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 03:53:43,247 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 03:53:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:43,247 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 03:53:43,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 03:53:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:43,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:43,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:43,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,453 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1272467414, now seen corresponding path program 37 times [2021-06-05 03:53:43,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:43,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43517109] [2021-06-05 03:53:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:43,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:43,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43517109] [2021-06-05 03:53:43,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43517109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219540111] [2021-06-05 03:53:43,540 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) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:43,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:43,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219540111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:43,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:43,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:43,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959049972] [2021-06-05 03:53:43,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:43,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:43,745 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:44,064 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-06-05 03:53:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:44,065 INFO L225 Difference]: With dead ends: 126 [2021-06-05 03:53:44,066 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 03:53:44,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 03:53:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-06-05 03:53:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-06-05 03:53:44,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-06-05 03:53:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:44,068 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-06-05 03:53:44,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:44,068 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-06-05 03:53:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:44,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:44,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:44,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:44,269 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash 164948120, now seen corresponding path program 38 times [2021-06-05 03:53:44,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:44,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931435331] [2021-06-05 03:53:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:44,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931435331] [2021-06-05 03:53:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931435331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966070129] [2021-06-05 03:53:44,341 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 [2021-06-05 03:53:44,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:44,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966070129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:44,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:44,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096330026] [2021-06-05 03:53:44,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:44,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:44,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:44,534 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:45,030 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-06-05 03:53:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:53:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 03:53:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,031 INFO L225 Difference]: With dead ends: 140 [2021-06-05 03:53:45,031 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 03:53:45,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:53:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 03:53:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-06-05 03:53:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-06-05 03:53:45,034 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-06-05 03:53:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:45,034 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-06-05 03:53:45,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-06-05 03:53:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:45,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:45,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:45,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 03:53:45,245 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash -217772268, now seen corresponding path program 39 times [2021-06-05 03:53:45,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:45,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039576404] [2021-06-05 03:53:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:45,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039576404] [2021-06-05 03:53:45,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039576404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026367700] [2021-06-05 03:53:45,330 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 [2021-06-05 03:53:45,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:45,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:45,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026367700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:45,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:45,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:45,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933531712] [2021-06-05 03:53:45,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:45,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:45,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:45,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:45,523 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:45,851 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-06-05 03:53:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 03:53:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:45,851 INFO L225 Difference]: With dead ends: 111 [2021-06-05 03:53:45,851 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 03:53:45,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:53:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 03:53:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-06-05 03:53:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-05 03:53:45,853 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-06-05 03:53:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:45,853 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-05 03:53:45,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-05 03:53:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:45,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:45,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:46,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 03:53:46,069 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1861521560, now seen corresponding path program 40 times [2021-06-05 03:53:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:46,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194116490] [2021-06-05 03:53:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194116490] [2021-06-05 03:53:46,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194116490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614631905] [2021-06-05 03:53:46,149 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 [2021-06-05 03:53:46,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:46,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:46,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:46,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614631905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:46,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:46,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:46,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434361785] [2021-06-05 03:53:46,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:46,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:46,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:46,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:46,386 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:46,980 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-06-05 03:53:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:53:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 03:53:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:46,981 INFO L225 Difference]: With dead ends: 182 [2021-06-05 03:53:46,981 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 03:53:46,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:53:46,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 03:53:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-06-05 03:53:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-06-05 03:53:46,984 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-06-05 03:53:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:46,984 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-06-05 03:53:46,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-06-05 03:53:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:46,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:46,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 03:53:47,185 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1876982356, now seen corresponding path program 41 times [2021-06-05 03:53:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284395395] [2021-06-05 03:53:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:47,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:47,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284395395] [2021-06-05 03:53:47,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284395395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635598295] [2021-06-05 03:53:47,263 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 [2021-06-05 03:53:47,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:47,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:47,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:47,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635598295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:47,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:47,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 03:53:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856446957] [2021-06-05 03:53:47,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:53:47,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:53:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:53:47,506 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:48,151 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-06-05 03:53:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:53:48,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-06-05 03:53:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:48,152 INFO L225 Difference]: With dead ends: 174 [2021-06-05 03:53:48,152 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 03:53:48,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:53:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 03:53:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-06-05 03:53:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-06-05 03:53:48,155 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-06-05 03:53:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:48,155 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-06-05 03:53:48,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-06-05 03:53:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:48,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:48,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:48,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:48,356 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1810322992, now seen corresponding path program 42 times [2021-06-05 03:53:48,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:48,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027414213] [2021-06-05 03:53:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027414213] [2021-06-05 03:53:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027414213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788591327] [2021-06-05 03:53:48,451 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 [2021-06-05 03:53:48,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:53:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:48,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788591327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:48,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:48,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:53:48,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045298804] [2021-06-05 03:53:48,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:53:48,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:53:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:53:48,644 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:48,917 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-06-05 03:53:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:53:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:48,918 INFO L225 Difference]: With dead ends: 127 [2021-06-05 03:53:48,918 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 03:53:48,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:53:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 03:53:48,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 03:53:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-06-05 03:53:48,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-06-05 03:53:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:48,920 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-06-05 03:53:48,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-06-05 03:53:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:48,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:48,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:49,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 03:53:49,137 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:49,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:49,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1561329620, now seen corresponding path program 43 times [2021-06-05 03:53:49,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:49,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007068433] [2021-06-05 03:53:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:49,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007068433] [2021-06-05 03:53:49,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007068433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488914485] [2021-06-05 03:53:49,225 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 [2021-06-05 03:53:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:49,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488914485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:49,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:49,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:49,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218033892] [2021-06-05 03:53:49,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:49,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:49,384 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:49,767 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-06-05 03:53:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:49,768 INFO L225 Difference]: With dead ends: 163 [2021-06-05 03:53:49,768 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 03:53:49,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 03:53:49,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-06-05 03:53:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-06-05 03:53:49,770 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-06-05 03:53:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:49,770 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-06-05 03:53:49,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-06-05 03:53:49,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:49,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:49,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:49,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 03:53:49,985 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1576790416, now seen corresponding path program 44 times [2021-06-05 03:53:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:49,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584552219] [2021-06-05 03:53:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:50,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:50,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584552219] [2021-06-05 03:53:50,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584552219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:50,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845588788] [2021-06-05 03:53:50,071 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 [2021-06-05 03:53:50,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845588788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:50,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:50,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:50,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522007110] [2021-06-05 03:53:50,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:50,288 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:50,757 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-06-05 03:53:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:53:50,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:50,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:50,758 INFO L225 Difference]: With dead ends: 175 [2021-06-05 03:53:50,758 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 03:53:50,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:53:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 03:53:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-06-05 03:53:50,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-05 03:53:50,761 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-06-05 03:53:50,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:50,761 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-05 03:53:50,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:50,761 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-05 03:53:50,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:50,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:50,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:50,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:50,984 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2146722074, now seen corresponding path program 45 times [2021-06-05 03:53:50,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:50,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455565415] [2021-06-05 03:53:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455565415] [2021-06-05 03:53:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455565415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078621334] [2021-06-05 03:53:51,059 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 [2021-06-05 03:53:51,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078621334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:51,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:51,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046201879] [2021-06-05 03:53:51,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:51,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:51,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:51,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:51,230 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:51,565 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-06-05 03:53:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:51,565 INFO L225 Difference]: With dead ends: 138 [2021-06-05 03:53:51,565 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 03:53:51,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:53:51,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 03:53:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-06-05 03:53:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-06-05 03:53:51,568 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-06-05 03:53:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:51,568 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-06-05 03:53:51,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-06-05 03:53:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:51,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:51,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:51,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 03:53:51,791 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash -709306540, now seen corresponding path program 46 times [2021-06-05 03:53:51,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:51,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431124083] [2021-06-05 03:53:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:51,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431124083] [2021-06-05 03:53:51,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431124083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425042664] [2021-06-05 03:53:51,878 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 [2021-06-05 03:53:51,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:51,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:51,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425042664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:52,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:52,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958742113] [2021-06-05 03:53:52,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:52,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:52,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:52,049 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:52,316 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-06-05 03:53:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:52,316 INFO L225 Difference]: With dead ends: 145 [2021-06-05 03:53:52,316 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 03:53:52,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 03:53:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-06-05 03:53:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-06-05 03:53:52,319 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-06-05 03:53:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:52,319 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-06-05 03:53:52,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-06-05 03:53:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:52,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:52,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:52,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:52,541 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1092026928, now seen corresponding path program 47 times [2021-06-05 03:53:52,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:52,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576516995] [2021-06-05 03:53:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:52,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:52,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576516995] [2021-06-05 03:53:52,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576516995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762825884] [2021-06-05 03:53:52,614 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 [2021-06-05 03:53:52,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:53:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:52,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762825884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:52,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:52,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:52,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245146262] [2021-06-05 03:53:52,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:52,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:52,810 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:53,130 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-06-05 03:53:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:53:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:53,131 INFO L225 Difference]: With dead ends: 134 [2021-06-05 03:53:53,131 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 03:53:53,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:53:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 03:53:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-06-05 03:53:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-06-05 03:53:53,133 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-06-05 03:53:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:53,134 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-06-05 03:53:53,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-06-05 03:53:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:53,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:53,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:53,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 03:53:53,349 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:53,349 INFO L82 PathProgramCache]: Analyzing trace with hash 987266900, now seen corresponding path program 48 times [2021-06-05 03:53:53,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:53,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184762763] [2021-06-05 03:53:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:53,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:53,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184762763] [2021-06-05 03:53:53,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184762763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545133180] [2021-06-05 03:53:53,435 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 [2021-06-05 03:53:53,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:53,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545133180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:53,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:53,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873520666] [2021-06-05 03:53:53,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:53,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:53,607 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:54,007 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-06-05 03:53:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:54,008 INFO L225 Difference]: With dead ends: 175 [2021-06-05 03:53:54,008 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 03:53:54,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:53:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 03:53:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-06-05 03:53:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-06-05 03:53:54,010 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-06-05 03:53:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:54,011 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-06-05 03:53:54,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-06-05 03:53:54,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:54,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:54,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:54,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 03:53:54,230 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1002727696, now seen corresponding path program 49 times [2021-06-05 03:53:54,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:54,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906622682] [2021-06-05 03:53:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:54,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906622682] [2021-06-05 03:53:54,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906622682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769042431] [2021-06-05 03:53:54,319 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 [2021-06-05 03:53:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769042431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:54,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:54,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099052019] [2021-06-05 03:53:54,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:54,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:54,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:54,506 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:54,839 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-06-05 03:53:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:53:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:54,840 INFO L225 Difference]: With dead ends: 165 [2021-06-05 03:53:54,840 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 03:53:54,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 03:53:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-06-05 03:53:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-06-05 03:53:54,843 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-06-05 03:53:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:54,843 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-06-05 03:53:54,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-06-05 03:53:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:54,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:54,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:55,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:55,065 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389644, now seen corresponding path program 50 times [2021-06-05 03:53:55,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:55,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793635688] [2021-06-05 03:53:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:55,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793635688] [2021-06-05 03:53:55,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793635688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396112423] [2021-06-05 03:53:55,150 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 [2021-06-05 03:53:55,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:55,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:55,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:55,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396112423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:55,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:55,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:55,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423232105] [2021-06-05 03:53:55,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:55,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:55,357 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:55,750 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-06-05 03:53:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:53:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:55,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:55,751 INFO L225 Difference]: With dead ends: 162 [2021-06-05 03:53:55,751 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 03:53:55,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:53:55,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 03:53:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-06-05 03:53:55,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-06-05 03:53:55,753 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-06-05 03:53:55,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:55,753 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-06-05 03:53:55,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-06-05 03:53:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:55,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:55,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:55,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 03:53:55,969 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash -79334396, now seen corresponding path program 51 times [2021-06-05 03:53:55,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:55,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121247830] [2021-06-05 03:53:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:56,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121247830] [2021-06-05 03:53:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121247830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405959548] [2021-06-05 03:53:56,062 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 [2021-06-05 03:53:56,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:53:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:56,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405959548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:56,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:56,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645723858] [2021-06-05 03:53:56,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:56,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:56,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:56,320 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:56,532 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-06-05 03:53:56,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:53:56,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:56,532 INFO L225 Difference]: With dead ends: 121 [2021-06-05 03:53:56,533 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 03:53:56,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 03:53:56,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-06-05 03:53:56,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 03:53:56,537 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 03:53:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:56,538 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 03:53:56,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 03:53:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:56,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:56,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:56,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:56,753 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1999959432, now seen corresponding path program 52 times [2021-06-05 03:53:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:56,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752947137] [2021-06-05 03:53:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:56,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752947137] [2021-06-05 03:53:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752947137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:56,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211433039] [2021-06-05 03:53:56,837 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 [2021-06-05 03:53:56,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:53:56,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211433039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:57,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:57,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025219898] [2021-06-05 03:53:57,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:57,049 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:57,394 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 03:53:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:53:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:57,395 INFO L225 Difference]: With dead ends: 160 [2021-06-05 03:53:57,395 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 03:53:57,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:53:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 03:53:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-06-05 03:53:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-06-05 03:53:57,399 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-06-05 03:53:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:57,399 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-06-05 03:53:57,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-06-05 03:53:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:57,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:57,400 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:57,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 03:53:57,600 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:57,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2015420228, now seen corresponding path program 53 times [2021-06-05 03:53:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298075018] [2021-06-05 03:53:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298075018] [2021-06-05 03:53:57,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298075018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677662325] [2021-06-05 03:53:57,692 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 [2021-06-05 03:53:57,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:53:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:57,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677662325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:57,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:57,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:57,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653546764] [2021-06-05 03:53:57,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:57,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:57,874 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,132 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-05 03:53:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:53:58,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,133 INFO L225 Difference]: With dead ends: 152 [2021-06-05 03:53:58,133 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 03:53:58,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:53:58,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 03:53:58,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-06-05 03:53:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-06-05 03:53:58,135 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-06-05 03:53:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:58,135 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-06-05 03:53:58,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-06-05 03:53:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:58,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:58,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 03:53:58,337 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:58,337 INFO L82 PathProgramCache]: Analyzing trace with hash -148837104, now seen corresponding path program 54 times [2021-06-05 03:53:58,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:58,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704373066] [2021-06-05 03:53:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:58,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704373066] [2021-06-05 03:53:58,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704373066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397186020] [2021-06-05 03:53:58,423 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 [2021-06-05 03:53:58,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:53:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:58,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:58,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:58,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397186020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:58,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:58,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559225592] [2021-06-05 03:53:58,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:58,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:58,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:58,581 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:58,804 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-06-05 03:53:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:58,804 INFO L225 Difference]: With dead ends: 155 [2021-06-05 03:53:58,804 INFO L226 Difference]: Without dead ends: 148 [2021-06-05 03:53:58,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-05 03:53:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-06-05 03:53:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-06-05 03:53:58,806 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-06-05 03:53:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:58,806 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-06-05 03:53:58,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-06-05 03:53:58,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:58,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:58,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:59,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:59,007 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:59,008 INFO L82 PathProgramCache]: Analyzing trace with hash -133376308, now seen corresponding path program 55 times [2021-06-05 03:53:59,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:59,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397698949] [2021-06-05 03:53:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:59,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397698949] [2021-06-05 03:53:59,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397698949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659775113] [2021-06-05 03:53:59,089 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 [2021-06-05 03:53:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:59,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659775113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:59,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:59,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839204763] [2021-06-05 03:53:59,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:59,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:59,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:59,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:59,283 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:53:59,502 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-06-05 03:53:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:53:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:53:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:53:59,503 INFO L225 Difference]: With dead ends: 167 [2021-06-05 03:53:59,503 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 03:53:59,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:53:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 03:53:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-06-05 03:53:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 03:53:59,505 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 03:53:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:53:59,505 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 03:53:59,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:53:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 03:53:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:53:59,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:53:59,506 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:53:59,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:53:59,728 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:53:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:53:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 438078498, now seen corresponding path program 56 times [2021-06-05 03:53:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:53:59,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12291067] [2021-06-05 03:53:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:53:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:53:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:53:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12291067] [2021-06-05 03:53:59,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12291067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547528929] [2021-06-05 03:53:59,808 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 [2021-06-05 03:53:59,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:53:59,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:53:59,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:53:59,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:53:59,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:53:59,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547528929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:53:59,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:53:59,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 03:53:59,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815223393] [2021-06-05 03:53:59,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:53:59,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:53:59,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:53:59,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:53:59,964 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:00,170 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-06-05 03:54:00,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:00,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:54:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:00,170 INFO L225 Difference]: With dead ends: 128 [2021-06-05 03:54:00,170 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 03:54:00,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 03:54:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-06-05 03:54:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 03:54:00,172 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 03:54:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:00,172 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 03:54:00,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 03:54:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:00,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:00,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:00,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:00,389 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash 984287384, now seen corresponding path program 57 times [2021-06-05 03:54:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:00,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325550166] [2021-06-05 03:54:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325550166] [2021-06-05 03:54:00,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325550166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784640478] [2021-06-05 03:54:00,474 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 [2021-06-05 03:54:00,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:00,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784640478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:00,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:00,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:00,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488489164] [2021-06-05 03:54:00,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:00,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:00,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:00,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:00,689 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:00,945 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-06-05 03:54:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:00,946 INFO L225 Difference]: With dead ends: 163 [2021-06-05 03:54:00,946 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:54:00,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:54:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-06-05 03:54:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-06-05 03:54:00,948 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-06-05 03:54:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:00,948 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-06-05 03:54:00,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-06-05 03:54:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:00,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:00,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:01,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:01,153 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:01,153 INFO L82 PathProgramCache]: Analyzing trace with hash 601566996, now seen corresponding path program 58 times [2021-06-05 03:54:01,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:01,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437283276] [2021-06-05 03:54:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:01,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:01,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437283276] [2021-06-05 03:54:01,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437283276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:01,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918794815] [2021-06-05 03:54:01,229 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 [2021-06-05 03:54:01,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:01,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918794815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:01,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:01,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755550117] [2021-06-05 03:54:01,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:01,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:01,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:01,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:01,407 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:01,737 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-06-05 03:54:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:01,738 INFO L225 Difference]: With dead ends: 144 [2021-06-05 03:54:01,738 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 03:54:01,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 03:54:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-06-05 03:54:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-06-05 03:54:01,739 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-06-05 03:54:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:01,740 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-06-05 03:54:01,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-06-05 03:54:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:01,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:01,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:01,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:01,945 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:01,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1614106472, now seen corresponding path program 59 times [2021-06-05 03:54:01,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:01,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643549562] [2021-06-05 03:54:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643549562] [2021-06-05 03:54:02,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643549562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032015151] [2021-06-05 03:54:02,032 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 [2021-06-05 03:54:02,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:02,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032015151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:02,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:02,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302019677] [2021-06-05 03:54:02,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:02,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:02,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:02,236 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:02,700 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-06-05 03:54:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:54:02,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:02,701 INFO L225 Difference]: With dead ends: 190 [2021-06-05 03:54:02,701 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 03:54:02,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 03:54:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-06-05 03:54:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-05 03:54:02,703 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-06-05 03:54:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:02,703 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-05 03:54:02,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-05 03:54:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:02,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:02,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:02,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 03:54:02,904 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1598645676, now seen corresponding path program 60 times [2021-06-05 03:54:02,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:02,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112834685] [2021-06-05 03:54:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:02,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:02,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112834685] [2021-06-05 03:54:02,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112834685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:02,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568667233] [2021-06-05 03:54:02,999 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 [2021-06-05 03:54:03,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:03,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568667233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:03,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:03,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020042432] [2021-06-05 03:54:03,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:03,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:03,178 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:03,598 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-06-05 03:54:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:03,599 INFO L225 Difference]: With dead ends: 178 [2021-06-05 03:54:03,599 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 03:54:03,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 03:54:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-06-05 03:54:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-06-05 03:54:03,601 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-06-05 03:54:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:03,601 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-06-05 03:54:03,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-06-05 03:54:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:03,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:03,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:03,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 03:54:03,815 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1614259528, now seen corresponding path program 61 times [2021-06-05 03:54:03,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:03,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559225960] [2021-06-05 03:54:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:03,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:03,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559225960] [2021-06-05 03:54:03,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559225960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:03,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185733527] [2021-06-05 03:54:03,894 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 [2021-06-05 03:54:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:03,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185733527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:04,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:04,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944444684] [2021-06-05 03:54:04,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:04,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:04,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:04,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:04,062 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:04,272 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-06-05 03:54:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:04,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:04,273 INFO L225 Difference]: With dead ends: 130 [2021-06-05 03:54:04,273 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 03:54:04,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 03:54:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-06-05 03:54:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-06-05 03:54:04,275 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-06-05 03:54:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:04,275 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-06-05 03:54:04,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-06-05 03:54:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:04,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:04,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:04,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:04,476 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash -601413940, now seen corresponding path program 62 times [2021-06-05 03:54:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:04,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955237131] [2021-06-05 03:54:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955237131] [2021-06-05 03:54:04,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955237131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120746396] [2021-06-05 03:54:04,551 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 [2021-06-05 03:54:04,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:04,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:04,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120746396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:04,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:04,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580770990] [2021-06-05 03:54:04,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:04,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:04,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:04,722 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:05,093 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-06-05 03:54:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:54:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:05,094 INFO L225 Difference]: With dead ends: 174 [2021-06-05 03:54:05,094 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 03:54:05,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 03:54:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-06-05 03:54:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 03:54:05,096 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-06-05 03:54:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:05,096 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 03:54:05,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 03:54:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:05,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:05,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:05,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 03:54:05,313 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash -585953144, now seen corresponding path program 63 times [2021-06-05 03:54:05,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:05,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951897104] [2021-06-05 03:54:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:05,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951897104] [2021-06-05 03:54:05,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951897104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640146880] [2021-06-05 03:54:05,389 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 [2021-06-05 03:54:05,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:05,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640146880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:05,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:05,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510483940] [2021-06-05 03:54:05,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:05,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:05,550 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:05,843 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-06-05 03:54:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:05,844 INFO L225 Difference]: With dead ends: 164 [2021-06-05 03:54:05,844 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 03:54:05,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 03:54:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-06-05 03:54:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-06-05 03:54:05,846 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-06-05 03:54:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:05,846 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-06-05 03:54:05,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-06-05 03:54:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:05,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:05,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:06,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 03:54:06,057 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:06,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1544756820, now seen corresponding path program 64 times [2021-06-05 03:54:06,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:06,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990321841] [2021-06-05 03:54:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:06,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990321841] [2021-06-05 03:54:06,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990321841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172350902] [2021-06-05 03:54:06,134 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 [2021-06-05 03:54:06,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:06,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172350902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:06,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:06,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738094010] [2021-06-05 03:54:06,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:06,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:06,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:06,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:06,309 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:06,634 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-06-05 03:54:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:06,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:06,635 INFO L225 Difference]: With dead ends: 172 [2021-06-05 03:54:06,636 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 03:54:06,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 03:54:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-06-05 03:54:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 03:54:06,638 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-06-05 03:54:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:06,638 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 03:54:06,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 03:54:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:06,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:06,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:06,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 03:54:06,857 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:06,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1560217616, now seen corresponding path program 65 times [2021-06-05 03:54:06,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:06,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201076283] [2021-06-05 03:54:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:06,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:06,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201076283] [2021-06-05 03:54:06,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201076283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:06,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953940797] [2021-06-05 03:54:06,932 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 [2021-06-05 03:54:06,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:06,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953940797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:07,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:07,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236148662] [2021-06-05 03:54:07,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:07,110 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:07,356 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-06-05 03:54:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:07,356 INFO L225 Difference]: With dead ends: 186 [2021-06-05 03:54:07,356 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 03:54:07,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 03:54:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-06-05 03:54:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-06-05 03:54:07,359 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-06-05 03:54:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:07,359 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-06-05 03:54:07,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-06-05 03:54:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:07,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:07,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:07,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:07,569 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2131672422, now seen corresponding path program 66 times [2021-06-05 03:54:07,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:07,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665932039] [2021-06-05 03:54:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665932039] [2021-06-05 03:54:07,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665932039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306737923] [2021-06-05 03:54:07,649 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 [2021-06-05 03:54:07,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:07,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306737923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:07,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:07,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:07,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829227052] [2021-06-05 03:54:07,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:07,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:07,822 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:08,091 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-06-05 03:54:08,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:08,092 INFO L225 Difference]: With dead ends: 143 [2021-06-05 03:54:08,092 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 03:54:08,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:08,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 03:54:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-06-05 03:54:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-06-05 03:54:08,094 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-06-05 03:54:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:08,094 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-06-05 03:54:08,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-06-05 03:54:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:08,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:08,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:08,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:08,309 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:08,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:08,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1794909488, now seen corresponding path program 67 times [2021-06-05 03:54:08,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:08,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012476151] [2021-06-05 03:54:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:08,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:08,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012476151] [2021-06-05 03:54:08,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012476151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:08,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474999616] [2021-06-05 03:54:08,386 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 [2021-06-05 03:54:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:08,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474999616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:08,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:08,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:08,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181605073] [2021-06-05 03:54:08,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:08,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:08,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:08,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:08,556 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:08,703 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-06-05 03:54:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:54:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:08,704 INFO L225 Difference]: With dead ends: 111 [2021-06-05 03:54:08,704 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 03:54:08,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:08,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 03:54:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-06-05 03:54:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-06-05 03:54:08,706 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-06-05 03:54:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:08,706 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-06-05 03:54:08,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-06-05 03:54:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:08,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:08,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:08,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:08,921 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash 284384340, now seen corresponding path program 68 times [2021-06-05 03:54:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:08,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821515339] [2021-06-05 03:54:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:08,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821515339] [2021-06-05 03:54:08,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821515339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:08,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183986643] [2021-06-05 03:54:08,997 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 [2021-06-05 03:54:09,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:09,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183986643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:09,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:09,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50541681] [2021-06-05 03:54:09,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:09,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:09,173 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:09,504 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-05 03:54:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:09,505 INFO L225 Difference]: With dead ends: 144 [2021-06-05 03:54:09,505 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 03:54:09,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 03:54:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-06-05 03:54:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-06-05 03:54:09,506 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-06-05 03:54:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:09,506 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-06-05 03:54:09,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-06-05 03:54:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:09,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:09,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:09,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 03:54:09,729 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:09,729 INFO L82 PathProgramCache]: Analyzing trace with hash 299845136, now seen corresponding path program 69 times [2021-06-05 03:54:09,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:09,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255279390] [2021-06-05 03:54:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:09,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:09,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255279390] [2021-06-05 03:54:09,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255279390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086663572] [2021-06-05 03:54:09,800 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 [2021-06-05 03:54:09,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:09,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:09,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086663572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:09,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:09,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:09,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719487209] [2021-06-05 03:54:09,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:09,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:10,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:10,000 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:10,242 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-06-05 03:54:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:10,242 INFO L225 Difference]: With dead ends: 139 [2021-06-05 03:54:10,242 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 03:54:10,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 279.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 03:54:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-06-05 03:54:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-06-05 03:54:10,244 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-06-05 03:54:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:10,244 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-06-05 03:54:10,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-06-05 03:54:10,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:10,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:10,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:10,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:10,457 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:10,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1864412196, now seen corresponding path program 70 times [2021-06-05 03:54:10,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:10,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790904398] [2021-06-05 03:54:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:10,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790904398] [2021-06-05 03:54:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790904398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876520037] [2021-06-05 03:54:10,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:10,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:10,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:10,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:10,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876520037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:10,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:10,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:10,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326170648] [2021-06-05 03:54:10,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:10,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:10,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:10,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:10,704 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:10,950 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-06-05 03:54:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:10,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:10,951 INFO L225 Difference]: With dead ends: 140 [2021-06-05 03:54:10,951 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 03:54:10,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 03:54:10,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-06-05 03:54:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-06-05 03:54:10,953 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-06-05 03:54:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:10,953 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-06-05 03:54:10,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-06-05 03:54:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:10,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:10,953 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:11,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:11,154 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:11,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:11,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1848951400, now seen corresponding path program 71 times [2021-06-05 03:54:11,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:11,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457677885] [2021-06-05 03:54:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:11,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457677885] [2021-06-05 03:54:11,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457677885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867854172] [2021-06-05 03:54:11,246 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 [2021-06-05 03:54:11,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:11,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867854172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:11,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:11,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397723256] [2021-06-05 03:54:11,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:11,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:11,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:11,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:11,406 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:11,612 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-06-05 03:54:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:11,613 INFO L225 Difference]: With dead ends: 151 [2021-06-05 03:54:11,613 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 03:54:11,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 03:54:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-06-05 03:54:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-06-05 03:54:11,617 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-06-05 03:54:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:11,617 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-06-05 03:54:11,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-06-05 03:54:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:11,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:11,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:11,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 03:54:11,818 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1277496594, now seen corresponding path program 72 times [2021-06-05 03:54:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:11,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238282456] [2021-06-05 03:54:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:11,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238282456] [2021-06-05 03:54:11,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238282456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:11,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999610972] [2021-06-05 03:54:11,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:11,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:11,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:11,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:11,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999610972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:12,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:12,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015382886] [2021-06-05 03:54:12,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:12,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:12,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:12,073 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:12,263 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-06-05 03:54:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:12,264 INFO L225 Difference]: With dead ends: 124 [2021-06-05 03:54:12,264 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 03:54:12,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 03:54:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-06-05 03:54:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-06-05 03:54:12,266 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-06-05 03:54:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:12,266 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-06-05 03:54:12,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-06-05 03:54:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:12,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:12,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:12,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 03:54:12,467 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1336463512, now seen corresponding path program 73 times [2021-06-05 03:54:12,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:12,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475429888] [2021-06-05 03:54:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475429888] [2021-06-05 03:54:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475429888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623137229] [2021-06-05 03:54:12,559 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 [2021-06-05 03:54:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:12,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623137229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:12,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:12,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:12,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338740128] [2021-06-05 03:54:12,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:12,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:12,783 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:13,105 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-06-05 03:54:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:13,106 INFO L225 Difference]: With dead ends: 157 [2021-06-05 03:54:13,106 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 03:54:13,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:13,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 03:54:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-06-05 03:54:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-06-05 03:54:13,107 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-06-05 03:54:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:13,108 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-06-05 03:54:13,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-06-05 03:54:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:13,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:13,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:13,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:13,308 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1351924308, now seen corresponding path program 74 times [2021-06-05 03:54:13,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:13,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602802360] [2021-06-05 03:54:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:13,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:13,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602802360] [2021-06-05 03:54:13,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602802360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843777363] [2021-06-05 03:54:13,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:13,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:13,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:13,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843777363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:13,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:13,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:13,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813324044] [2021-06-05 03:54:13,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:13,567 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:13,906 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-06-05 03:54:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:13,907 INFO L225 Difference]: With dead ends: 169 [2021-06-05 03:54:13,907 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 03:54:13,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 03:54:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-06-05 03:54:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-06-05 03:54:13,909 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-06-05 03:54:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:13,909 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-06-05 03:54:13,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-06-05 03:54:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:13,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:13,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:14,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:14,132 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1923379114, now seen corresponding path program 75 times [2021-06-05 03:54:14,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:14,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339096421] [2021-06-05 03:54:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:14,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339096421] [2021-06-05 03:54:14,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339096421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203558923] [2021-06-05 03:54:14,212 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 [2021-06-05 03:54:14,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:14,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:14,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:14,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203558923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:14,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:14,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825361738] [2021-06-05 03:54:14,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:14,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:14,395 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:14,691 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-06-05 03:54:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:54:14,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:14,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:14,692 INFO L225 Difference]: With dead ends: 141 [2021-06-05 03:54:14,692 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 03:54:14,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 03:54:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-06-05 03:54:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-06-05 03:54:14,694 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-06-05 03:54:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:14,694 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-06-05 03:54:14,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:14,694 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-06-05 03:54:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:14,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:14,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:14,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:14,901 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 762400792, now seen corresponding path program 4 times [2021-06-05 03:54:14,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:14,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521052323] [2021-06-05 03:54:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:14,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:14,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521052323] [2021-06-05 03:54:14,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521052323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:14,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011138616] [2021-06-05 03:54:14,975 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 [2021-06-05 03:54:14,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:14,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:54:14,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011138616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:15,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 03:54:15,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342758676] [2021-06-05 03:54:15,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 03:54:15,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 03:54:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:54:15,063 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:15,210 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-06-05 03:54:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:54:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:54:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:15,211 INFO L225 Difference]: With dead ends: 130 [2021-06-05 03:54:15,211 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 03:54:15,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:54:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 03:54:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-06-05 03:54:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-06-05 03:54:15,212 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-06-05 03:54:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:15,213 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-06-05 03:54:15,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-06-05 03:54:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:54:15,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:15,213 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:15,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,425 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:15,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1385523536, now seen corresponding path program 76 times [2021-06-05 03:54:15,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:15,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90685234] [2021-06-05 03:54:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90685234] [2021-06-05 03:54:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90685234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343016915] [2021-06-05 03:54:15,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:15,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 03:54:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:15,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343016915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:15,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:15,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 03:54:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569390046] [2021-06-05 03:54:15,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 03:54:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 03:54:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:54:15,691 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:16,073 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-06-05 03:54:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:54:16,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:16,073 INFO L225 Difference]: With dead ends: 153 [2021-06-05 03:54:16,073 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 03:54:16,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 03:54:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-06-05 03:54:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-06-05 03:54:16,075 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-06-05 03:54:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:16,075 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-06-05 03:54:16,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-06-05 03:54:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:16,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:16,076 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:16,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,281 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 255431194, now seen corresponding path program 4 times [2021-06-05 03:54:16,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:16,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11737257] [2021-06-05 03:54:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:16,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11737257] [2021-06-05 03:54:16,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11737257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800702188] [2021-06-05 03:54:16,376 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:16,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:16,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:54:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:16,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800702188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:16,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:16,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 03:54:16,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133161211] [2021-06-05 03:54:16,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:54:16,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:16,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:54:16,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:54:16,489 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:16,697 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-06-05 03:54:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:54:16,698 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 19 [2021-06-05 03:54:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:16,698 INFO L225 Difference]: With dead ends: 132 [2021-06-05 03:54:16,698 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 03:54:16,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 259.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:54:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 03:54:16,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-06-05 03:54:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-05 03:54:16,700 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-06-05 03:54:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:16,700 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-05 03:54:16,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-05 03:54:16,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:16,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:16,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:16,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 03:54:16,922 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:16,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2015204966, now seen corresponding path program 77 times [2021-06-05 03:54:16,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:16,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053617636] [2021-06-05 03:54:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:17,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:17,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053617636] [2021-06-05 03:54:17,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053617636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245657711] [2021-06-05 03:54:17,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:17,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:17,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245657711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:17,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:17,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75704254] [2021-06-05 03:54:17,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:17,223 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:17,542 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-06-05 03:54:17,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:17,543 INFO L225 Difference]: With dead ends: 136 [2021-06-05 03:54:17,543 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 03:54:17,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 03:54:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-06-05 03:54:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-05 03:54:17,545 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-06-05 03:54:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:17,545 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-05 03:54:17,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-05 03:54:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:17,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:17,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:17,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,746 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:17,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1897041942, now seen corresponding path program 78 times [2021-06-05 03:54:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:17,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673194231] [2021-06-05 03:54:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:17,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:17,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673194231] [2021-06-05 03:54:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673194231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:17,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517054785] [2021-06-05 03:54:17,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:17,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:17,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:17,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:18,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517054785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:18,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:18,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290418301] [2021-06-05 03:54:18,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:18,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:18,036 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:18,348 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-06-05 03:54:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:18,349 INFO L225 Difference]: With dead ends: 141 [2021-06-05 03:54:18,349 INFO L226 Difference]: Without dead ends: 134 [2021-06-05 03:54:18,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-06-05 03:54:18,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-06-05 03:54:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-05 03:54:18,351 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-05 03:54:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:18,351 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-05 03:54:18,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-05 03:54:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:18,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:18,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:18,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 03:54:18,565 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash -318631526, now seen corresponding path program 79 times [2021-06-05 03:54:18,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:18,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224246804] [2021-06-05 03:54:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:18,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:18,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224246804] [2021-06-05 03:54:18,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224246804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270503377] [2021-06-05 03:54:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:18,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270503377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:18,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:18,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14545860] [2021-06-05 03:54:18,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:18,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:18,854 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:19,173 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-06-05 03:54:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:19,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:19,174 INFO L225 Difference]: With dead ends: 167 [2021-06-05 03:54:19,174 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 03:54:19,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:54:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 03:54:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-06-05 03:54:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-05 03:54:19,176 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-05 03:54:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:19,176 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-05 03:54:19,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-05 03:54:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:19,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:19,176 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:19,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 03:54:19,377 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash -303170730, now seen corresponding path program 80 times [2021-06-05 03:54:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853978112] [2021-06-05 03:54:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:19,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853978112] [2021-06-05 03:54:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853978112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401506632] [2021-06-05 03:54:19,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:19,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:19,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:19,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401506632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:19,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:19,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:19,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409060970] [2021-06-05 03:54:19,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:19,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:19,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:19,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:19,677 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:20,057 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-05 03:54:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:54:20,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:20,058 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:54:20,058 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:54:20,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:54:20,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-06-05 03:54:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-06-05 03:54:20,060 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-06-05 03:54:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:20,060 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-06-05 03:54:20,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,060 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-06-05 03:54:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:20,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:20,060 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:20,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:20,261 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:20,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1454735530, now seen corresponding path program 81 times [2021-06-05 03:54:20,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:20,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427205728] [2021-06-05 03:54:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:20,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:20,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427205728] [2021-06-05 03:54:20,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427205728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:20,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94355255] [2021-06-05 03:54:20,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:20,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:20,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:20,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94355255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:20,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:20,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:20,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798796649] [2021-06-05 03:54:20,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:20,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:20,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:20,541 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:20,860 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-06-05 03:54:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:20,861 INFO L225 Difference]: With dead ends: 158 [2021-06-05 03:54:20,861 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 03:54:20,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 03:54:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-06-05 03:54:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-05 03:54:20,863 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-05 03:54:20,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:20,863 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-05 03:54:20,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-05 03:54:20,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:20,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:20,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:21,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,077 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:21,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1439274734, now seen corresponding path program 82 times [2021-06-05 03:54:21,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:21,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139973832] [2021-06-05 03:54:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:21,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139973832] [2021-06-05 03:54:21,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139973832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060097931] [2021-06-05 03:54:21,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:21,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060097931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:21,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:21,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106864151] [2021-06-05 03:54:21,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:21,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:21,358 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:21,670 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 03:54:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:54:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:21,671 INFO L225 Difference]: With dead ends: 160 [2021-06-05 03:54:21,671 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 03:54:21,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:54:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 03:54:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-05 03:54:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-05 03:54:21,677 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-05 03:54:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:21,677 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-05 03:54:21,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-05 03:54:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:21,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:21,677 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:21,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:21,878 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -867819928, now seen corresponding path program 83 times [2021-06-05 03:54:21,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:21,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173054011] [2021-06-05 03:54:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:21,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:21,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173054011] [2021-06-05 03:54:21,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173054011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:21,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757566328] [2021-06-05 03:54:21,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:22,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:22,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:22,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757566328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:22,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:22,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:22,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772065388] [2021-06-05 03:54:22,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:22,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:22,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:22,262 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:22,512 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-06-05 03:54:22,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:22,513 INFO L225 Difference]: With dead ends: 127 [2021-06-05 03:54:22,513 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 03:54:22,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 03:54:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-06-05 03:54:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-06-05 03:54:22,515 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-06-05 03:54:22,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:22,515 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-06-05 03:54:22,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:22,515 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-06-05 03:54:22,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:22,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:22,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:22,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,721 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2041798938, now seen corresponding path program 84 times [2021-06-05 03:54:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:22,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910211612] [2021-06-05 03:54:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:22,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:22,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910211612] [2021-06-05 03:54:22,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910211612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:22,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423793313] [2021-06-05 03:54:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:22,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:22,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:22,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:23,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423793313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:23,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:23,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700220237] [2021-06-05 03:54:23,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:23,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:23,062 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:23,240 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-06-05 03:54:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:23,241 INFO L225 Difference]: With dead ends: 125 [2021-06-05 03:54:23,241 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 03:54:23,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 03:54:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-06-05 03:54:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-06-05 03:54:23,242 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-06-05 03:54:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:23,242 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-06-05 03:54:23,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-06-05 03:54:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:23,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:23,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:23,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:23,449 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:23,449 INFO L82 PathProgramCache]: Analyzing trace with hash -499434542, now seen corresponding path program 85 times [2021-06-05 03:54:23,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:23,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326418887] [2021-06-05 03:54:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:23,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326418887] [2021-06-05 03:54:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326418887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633905613] [2021-06-05 03:54:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:23,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:23,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:23,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633905613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:23,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:23,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259675950] [2021-06-05 03:54:23,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:23,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:23,740 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:24,105 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-06-05 03:54:24,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:24,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:24,106 INFO L225 Difference]: With dead ends: 137 [2021-06-05 03:54:24,106 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 03:54:24,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 402.7ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 03:54:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-06-05 03:54:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-06-05 03:54:24,107 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-06-05 03:54:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:24,107 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-06-05 03:54:24,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-06-05 03:54:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:24,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:24,108 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:24,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:24,308 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:24,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859286, now seen corresponding path program 86 times [2021-06-05 03:54:24,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:24,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621809769] [2021-06-05 03:54:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621809769] [2021-06-05 03:54:24,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621809769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938017963] [2021-06-05 03:54:24,401 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:24,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:24,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:24,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938017963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:24,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:24,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706911418] [2021-06-05 03:54:24,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:24,601 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:24,982 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-06-05 03:54:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:24,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:24,983 INFO L225 Difference]: With dead ends: 192 [2021-06-05 03:54:24,983 INFO L226 Difference]: Without dead ends: 185 [2021-06-05 03:54:24,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-05 03:54:24,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-06-05 03:54:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-05 03:54:24,985 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-06-05 03:54:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:24,985 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-05 03:54:24,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-05 03:54:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:24,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:24,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:25,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:25,209 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1595320082, now seen corresponding path program 87 times [2021-06-05 03:54:25,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:25,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729972435] [2021-06-05 03:54:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:25,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729972435] [2021-06-05 03:54:25,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729972435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336440520] [2021-06-05 03:54:25,300 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:25,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:25,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:25,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:25,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:25,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336440520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:25,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:25,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:25,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585900557] [2021-06-05 03:54:25,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:25,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:25,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:25,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:25,516 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:25,979 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-06-05 03:54:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:25,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:25,980 INFO L225 Difference]: With dead ends: 176 [2021-06-05 03:54:25,980 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 03:54:25,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:54:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 03:54:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-06-05 03:54:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-06-05 03:54:25,982 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-06-05 03:54:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:25,982 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-06-05 03:54:25,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-06-05 03:54:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:25,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:25,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:26,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,183 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash -568937250, now seen corresponding path program 88 times [2021-06-05 03:54:26,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:26,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412172851] [2021-06-05 03:54:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:26,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:26,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412172851] [2021-06-05 03:54:26,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412172851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566784953] [2021-06-05 03:54:26,289 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:26,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:26,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:26,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:26,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566784953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:26,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:26,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:26,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583711326] [2021-06-05 03:54:26,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:26,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:26,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:26,526 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:27,132 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-06-05 03:54:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:27,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:27,133 INFO L225 Difference]: With dead ends: 198 [2021-06-05 03:54:27,133 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 03:54:27,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 03:54:27,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-06-05 03:54:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-06-05 03:54:27,135 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-06-05 03:54:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:27,136 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-06-05 03:54:27,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-06-05 03:54:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:27,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:27,136 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:27,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 03:54:27,349 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash -553476454, now seen corresponding path program 89 times [2021-06-05 03:54:27,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:27,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436638107] [2021-06-05 03:54:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:27,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:27,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436638107] [2021-06-05 03:54:27,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436638107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:27,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483513832] [2021-06-05 03:54:27,439 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:27,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:27,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483513832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:27,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577308165] [2021-06-05 03:54:27,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:27,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:27,647 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:28,124 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-06-05 03:54:28,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:28,125 INFO L225 Difference]: With dead ends: 209 [2021-06-05 03:54:28,125 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 03:54:28,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:54:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 03:54:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-06-05 03:54:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-06-05 03:54:28,127 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-06-05 03:54:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:28,127 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-06-05 03:54:28,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:28,128 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-06-05 03:54:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:28,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:28,128 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:28,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:28,341 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 17978352, now seen corresponding path program 90 times [2021-06-05 03:54:28,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:28,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119539813] [2021-06-05 03:54:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:28,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:28,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119539813] [2021-06-05 03:54:28,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119539813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767286492] [2021-06-05 03:54:28,438 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:28,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:28,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:28,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:28,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767286492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:28,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:28,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537070205] [2021-06-05 03:54:28,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:28,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:28,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:28,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:28,675 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:29,076 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-06-05 03:54:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:54:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:29,077 INFO L225 Difference]: With dead ends: 156 [2021-06-05 03:54:29,077 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:54:29,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:29,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:54:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-06-05 03:54:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-06-05 03:54:29,079 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-06-05 03:54:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:29,079 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-06-05 03:54:29,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-06-05 03:54:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:29,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:29,080 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:29,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,289 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1663028838, now seen corresponding path program 91 times [2021-06-05 03:54:29,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:29,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799592049] [2021-06-05 03:54:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:29,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799592049] [2021-06-05 03:54:29,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799592049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359472321] [2021-06-05 03:54:29,378 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:29,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359472321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:29,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:29,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:29,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424045992] [2021-06-05 03:54:29,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:29,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:29,576 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:30,171 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-06-05 03:54:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:30,172 INFO L225 Difference]: With dead ends: 231 [2021-06-05 03:54:30,172 INFO L226 Difference]: Without dead ends: 224 [2021-06-05 03:54:30,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:54:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-05 03:54:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-06-05 03:54:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 03:54:30,175 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 03:54:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:30,175 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 03:54:30,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 03:54:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:30,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:30,175 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:30,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 03:54:30,385 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1647568042, now seen corresponding path program 92 times [2021-06-05 03:54:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:30,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952967054] [2021-06-05 03:54:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:30,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:30,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952967054] [2021-06-05 03:54:30,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952967054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617483945] [2021-06-05 03:54:30,486 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:30,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:30,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:30,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617483945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:30,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:30,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:30,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111737494] [2021-06-05 03:54:30,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:30,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:30,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:30,716 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:31,325 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-06-05 03:54:31,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:54:31,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:31,326 INFO L225 Difference]: With dead ends: 245 [2021-06-05 03:54:31,326 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 03:54:31,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:54:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 03:54:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-06-05 03:54:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-05 03:54:31,328 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-05 03:54:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:31,329 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-05 03:54:31,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-05 03:54:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:31,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:31,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:31,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 03:54:31,537 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1076113236, now seen corresponding path program 93 times [2021-06-05 03:54:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:31,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446359051] [2021-06-05 03:54:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:31,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446359051] [2021-06-05 03:54:31,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446359051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674482350] [2021-06-05 03:54:31,622 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:31,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:31,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:31,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674482350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:31,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:31,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:31,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611811762] [2021-06-05 03:54:31,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:31,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:31,836 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:32,317 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-06-05 03:54:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:54:32,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:32,318 INFO L225 Difference]: With dead ends: 193 [2021-06-05 03:54:32,318 INFO L226 Difference]: Without dead ends: 186 [2021-06-05 03:54:32,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:54:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-05 03:54:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-06-05 03:54:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 03:54:32,320 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 03:54:32,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:32,320 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 03:54:32,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 03:54:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:32,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:32,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:32,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 03:54:32,525 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash 361302298, now seen corresponding path program 94 times [2021-06-05 03:54:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:32,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817872506] [2021-06-05 03:54:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:32,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:32,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817872506] [2021-06-05 03:54:32,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817872506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503877351] [2021-06-05 03:54:32,642 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:32,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:32,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:32,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503877351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:32,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:32,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635626557] [2021-06-05 03:54:32,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:32,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:32,942 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:33,193 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-06-05 03:54:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:33,195 INFO L225 Difference]: With dead ends: 142 [2021-06-05 03:54:33,195 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 03:54:33,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 03:54:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-06-05 03:54:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 03:54:33,196 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 03:54:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:33,197 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 03:54:33,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 03:54:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:33,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:33,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:33,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 03:54:33,398 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -21418090, now seen corresponding path program 95 times [2021-06-05 03:54:33,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:33,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998503725] [2021-06-05 03:54:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:33,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:33,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998503725] [2021-06-05 03:54:33,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998503725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345567495] [2021-06-05 03:54:33,505 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:33,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:33,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345567495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:33,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:33,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:33,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954073857] [2021-06-05 03:54:33,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:33,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:33,737 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:33,940 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-06-05 03:54:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:33,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:33,941 INFO L225 Difference]: With dead ends: 139 [2021-06-05 03:54:33,941 INFO L226 Difference]: Without dead ends: 132 [2021-06-05 03:54:33,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-06-05 03:54:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-06-05 03:54:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-06-05 03:54:33,943 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-06-05 03:54:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:33,943 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-06-05 03:54:33,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-06-05 03:54:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:33,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:33,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:34,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 03:54:34,165 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2057875738, now seen corresponding path program 96 times [2021-06-05 03:54:34,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:34,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144668244] [2021-06-05 03:54:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:34,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144668244] [2021-06-05 03:54:34,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144668244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869493798] [2021-06-05 03:54:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:34,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:34,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869493798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:34,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:34,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:34,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925566759] [2021-06-05 03:54:34,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:34,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:34,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:34,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:34,484 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:34,794 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-06-05 03:54:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:34,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:34,795 INFO L225 Difference]: With dead ends: 165 [2021-06-05 03:54:34,795 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 03:54:34,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 03:54:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-06-05 03:54:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 03:54:34,796 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 03:54:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:34,796 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 03:54:34,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 03:54:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:34,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:34,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:35,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 03:54:35,005 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2073336534, now seen corresponding path program 97 times [2021-06-05 03:54:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:35,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952759780] [2021-06-05 03:54:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952759780] [2021-06-05 03:54:35,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952759780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347630877] [2021-06-05 03:54:35,101 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347630877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:35,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:35,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893703234] [2021-06-05 03:54:35,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:35,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:35,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:35,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:35,357 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:35,594 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-06-05 03:54:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:35,595 INFO L225 Difference]: With dead ends: 152 [2021-06-05 03:54:35,595 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 03:54:35,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:35,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 03:54:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-05 03:54:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 03:54:35,597 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-06-05 03:54:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:35,597 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 03:54:35,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 03:54:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:35,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:35,598 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:35,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 03:54:35,798 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:35,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:35,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1613968814, now seen corresponding path program 98 times [2021-06-05 03:54:35,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:35,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065446363] [2021-06-05 03:54:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:35,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:35,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065446363] [2021-06-05 03:54:35,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065446363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:35,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813482244] [2021-06-05 03:54:35,882 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:35,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:35,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:35,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:35,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:36,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813482244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:36,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:36,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622630448] [2021-06-05 03:54:36,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:36,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:36,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:36,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:36,084 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:36,443 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-06-05 03:54:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:54:36,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:36,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:36,444 INFO L225 Difference]: With dead ends: 186 [2021-06-05 03:54:36,444 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 03:54:36,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:54:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 03:54:36,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-06-05 03:54:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-06-05 03:54:36,446 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-06-05 03:54:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:36,446 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-06-05 03:54:36,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-06-05 03:54:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:36,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:36,446 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:36,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:36,647 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683798, now seen corresponding path program 99 times [2021-06-05 03:54:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:36,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077942871] [2021-06-05 03:54:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:36,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077942871] [2021-06-05 03:54:36,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077942871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027952442] [2021-06-05 03:54:36,738 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:36,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:36,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:36,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:36,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027952442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:36,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:36,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:36,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609133408] [2021-06-05 03:54:36,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:36,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:36,921 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:37,808 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-06-05 03:54:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 03:54:37,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:37,809 INFO L225 Difference]: With dead ends: 286 [2021-06-05 03:54:37,809 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 03:54:37,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 735.1ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 03:54:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 03:54:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-06-05 03:54:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-05 03:54:37,812 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-06-05 03:54:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:37,812 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-05 03:54:37,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-05 03:54:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:37,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:37,812 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 03:54:38,025 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:38,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:38,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1773144594, now seen corresponding path program 100 times [2021-06-05 03:54:38,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590235067] [2021-06-05 03:54:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:38,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590235067] [2021-06-05 03:54:38,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590235067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858485628] [2021-06-05 03:54:38,133 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:54:38,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:38,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:38,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:38,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858485628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:38,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:38,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496090833] [2021-06-05 03:54:38,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:38,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:38,384 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:39,366 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-06-05 03:54:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 03:54:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:39,366 INFO L225 Difference]: With dead ends: 295 [2021-06-05 03:54:39,366 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 03:54:39,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 829.2ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 03:54:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 03:54:39,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-06-05 03:54:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 03:54:39,369 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 03:54:39,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:39,369 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 03:54:39,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 03:54:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:39,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:39,369 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:39,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,570 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:39,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1950367896, now seen corresponding path program 101 times [2021-06-05 03:54:39,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:39,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659858348] [2021-06-05 03:54:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:39,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:39,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659858348] [2021-06-05 03:54:39,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659858348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745553209] [2021-06-05 03:54:39,658 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:39,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:39,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:39,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:39,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745553209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:39,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:39,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432539877] [2021-06-05 03:54:39,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:39,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:39,869 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:40,670 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-06-05 03:54:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:54:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:40,671 INFO L225 Difference]: With dead ends: 223 [2021-06-05 03:54:40,671 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 03:54:40,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 699.7ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:54:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 03:54:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-06-05 03:54:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-06-05 03:54:40,673 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-06-05 03:54:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:40,673 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-06-05 03:54:40,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-06-05 03:54:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:40,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:40,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:40,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 03:54:40,889 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash -512952362, now seen corresponding path program 102 times [2021-06-05 03:54:40,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:40,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432911423] [2021-06-05 03:54:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:40,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:40,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432911423] [2021-06-05 03:54:40,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432911423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:40,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803613918] [2021-06-05 03:54:40,985 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:54:41,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:41,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:41,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:41,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803613918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:41,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:41,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411255388] [2021-06-05 03:54:41,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:41,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:41,280 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:41,536 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-06-05 03:54:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:41,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:41,537 INFO L225 Difference]: With dead ends: 146 [2021-06-05 03:54:41,537 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 03:54:41,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 03:54:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-06-05 03:54:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-05 03:54:41,538 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-06-05 03:54:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:41,539 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-05 03:54:41,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-05 03:54:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:41,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:41,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:41,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:41,739 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash -895672750, now seen corresponding path program 103 times [2021-06-05 03:54:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:41,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402140887] [2021-06-05 03:54:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:41,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:41,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402140887] [2021-06-05 03:54:41,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402140887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:41,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527225922] [2021-06-05 03:54:41,840 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527225922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:42,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:42,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869752634] [2021-06-05 03:54:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:42,070 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:42,325 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-06-05 03:54:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:42,325 INFO L225 Difference]: With dead ends: 151 [2021-06-05 03:54:42,325 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 03:54:42,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 03:54:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-06-05 03:54:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 03:54:42,327 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 03:54:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:42,327 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 03:54:42,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 03:54:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:42,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:42,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:42,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 03:54:42,528 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:42,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:42,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1183621078, now seen corresponding path program 104 times [2021-06-05 03:54:42,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:42,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888591753] [2021-06-05 03:54:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:42,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888591753] [2021-06-05 03:54:42,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888591753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027200563] [2021-06-05 03:54:42,618 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:42,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:42,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027200563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:42,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:42,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:42,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086011602] [2021-06-05 03:54:42,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:42,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:42,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:42,847 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:43,166 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-06-05 03:54:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:43,167 INFO L225 Difference]: With dead ends: 176 [2021-06-05 03:54:43,167 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 03:54:43,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 03:54:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-06-05 03:54:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-06-05 03:54:43,168 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-06-05 03:54:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:43,168 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-06-05 03:54:43,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-06-05 03:54:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:43,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:43,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:43,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 03:54:43,378 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1199081874, now seen corresponding path program 105 times [2021-06-05 03:54:43,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:43,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470793538] [2021-06-05 03:54:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:43,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470793538] [2021-06-05 03:54:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470793538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711340811] [2021-06-05 03:54:43,466 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:43,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:54:43,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:43,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:43,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711340811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:43,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:43,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:43,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524997913] [2021-06-05 03:54:43,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:43,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:43,682 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:44,026 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-06-05 03:54:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:54:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:44,026 INFO L225 Difference]: With dead ends: 163 [2021-06-05 03:54:44,026 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 03:54:44,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:54:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 03:54:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-06-05 03:54:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-06-05 03:54:44,028 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-06-05 03:54:44,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:44,028 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-06-05 03:54:44,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-06-05 03:54:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:44,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:44,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:44,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 03:54:44,229 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1806743822, now seen corresponding path program 106 times [2021-06-05 03:54:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:44,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061179937] [2021-06-05 03:54:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:44,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:44,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061179937] [2021-06-05 03:54:44,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061179937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191887307] [2021-06-05 03:54:44,310 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:44,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:44,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:54:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:44,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191887307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:44,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:44,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:44,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367145501] [2021-06-05 03:54:44,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:44,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:44,517 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:45,199 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-06-05 03:54:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:54:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:45,199 INFO L225 Difference]: With dead ends: 236 [2021-06-05 03:54:45,199 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 03:54:45,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:54:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 03:54:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-06-05 03:54:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-06-05 03:54:45,201 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-06-05 03:54:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:45,201 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-06-05 03:54:45,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-06-05 03:54:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:45,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:45,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:45,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:45,402 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:45,402 INFO L82 PathProgramCache]: Analyzing trace with hash 117019782, now seen corresponding path program 107 times [2021-06-05 03:54:45,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:45,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781499694] [2021-06-05 03:54:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:45,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:45,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781499694] [2021-06-05 03:54:45,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781499694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:45,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707892421] [2021-06-05 03:54:45,485 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:45,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:45,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:45,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707892421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:45,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:45,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435921240] [2021-06-05 03:54:45,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:45,715 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:45,918 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-06-05 03:54:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:45,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:45,918 INFO L225 Difference]: With dead ends: 126 [2021-06-05 03:54:45,919 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 03:54:45,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 298.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 03:54:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-06-05 03:54:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:54:45,920 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:54:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:45,920 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:54:45,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:54:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:45,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:45,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:46,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 03:54:46,137 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2098653686, now seen corresponding path program 108 times [2021-06-05 03:54:46,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:46,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848258935] [2021-06-05 03:54:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:46,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848258935] [2021-06-05 03:54:46,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848258935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822635925] [2021-06-05 03:54:46,224 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:46,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:46,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:46,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:46,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822635925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:46,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:46,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751252652] [2021-06-05 03:54:46,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:46,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:46,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:46,448 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:46,706 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-06-05 03:54:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:46,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:46,707 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:54:46,707 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:54:46,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:54:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-06-05 03:54:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-06-05 03:54:46,709 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-06-05 03:54:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:46,709 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-06-05 03:54:46,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-06-05 03:54:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:46,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:46,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:46,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:46,910 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:46,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2083192890, now seen corresponding path program 109 times [2021-06-05 03:54:46,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:46,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460785758] [2021-06-05 03:54:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460785758] [2021-06-05 03:54:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460785758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756842198] [2021-06-05 03:54:46,995 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:47,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756842198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:47,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:47,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717313340] [2021-06-05 03:54:47,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:47,236 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:47,511 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-06-05 03:54:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:54:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:47,511 INFO L225 Difference]: With dead ends: 137 [2021-06-05 03:54:47,512 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 03:54:47,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:54:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 03:54:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-06-05 03:54:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-06-05 03:54:47,513 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-06-05 03:54:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:47,513 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-06-05 03:54:47,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-06-05 03:54:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:47,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:47,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:47,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,729 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash 47517074, now seen corresponding path program 110 times [2021-06-05 03:54:47,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:47,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931165257] [2021-06-05 03:54:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:47,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:47,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931165257] [2021-06-05 03:54:47,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931165257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:47,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874732968] [2021-06-05 03:54:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:47,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:47,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:47,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:47,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874732968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:48,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693710385] [2021-06-05 03:54:48,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:48,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:48,057 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:48,274 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-06-05 03:54:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:48,275 INFO L225 Difference]: With dead ends: 145 [2021-06-05 03:54:48,275 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 03:54:48,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 03:54:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-05 03:54:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-06-05 03:54:48,277 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-06-05 03:54:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:48,277 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-06-05 03:54:48,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-06-05 03:54:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:48,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:48,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:48,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 03:54:48,481 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash 62977870, now seen corresponding path program 111 times [2021-06-05 03:54:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207022801] [2021-06-05 03:54:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:48,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:48,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207022801] [2021-06-05 03:54:48,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207022801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061161498] [2021-06-05 03:54:48,572 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:48,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:48,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:48,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061161498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:48,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:48,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:48,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70154749] [2021-06-05 03:54:48,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:48,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:48,791 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:48,976 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-06-05 03:54:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:48,977 INFO L225 Difference]: With dead ends: 151 [2021-06-05 03:54:48,977 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 03:54:48,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 03:54:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-06-05 03:54:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:54:48,979 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:54:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:48,979 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:54:48,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:54:48,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:48,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:48,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:49,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,180 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:49,180 INFO L82 PathProgramCache]: Analyzing trace with hash 634432676, now seen corresponding path program 112 times [2021-06-05 03:54:49,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:49,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296587289] [2021-06-05 03:54:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:49,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296587289] [2021-06-05 03:54:49,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296587289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439228747] [2021-06-05 03:54:49,261 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:49,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:49,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439228747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:49,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:49,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201911752] [2021-06-05 03:54:49,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:49,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:49,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:49,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:49,496 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:49,652 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-06-05 03:54:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:49,653 INFO L225 Difference]: With dead ends: 128 [2021-06-05 03:54:49,653 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 03:54:49,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 03:54:49,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-06-05 03:54:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:54:49,654 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:54:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:49,654 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:54:49,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:49,654 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:54:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:49,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:49,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:49,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,855 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:49,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1180641562, now seen corresponding path program 113 times [2021-06-05 03:54:49,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:49,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850030023] [2021-06-05 03:54:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:49,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:49,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850030023] [2021-06-05 03:54:49,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850030023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:49,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181002262] [2021-06-05 03:54:49,941 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:49,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:54:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181002262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:50,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:50,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141634445] [2021-06-05 03:54:50,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:50,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:50,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:50,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:50,175 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:50,447 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-06-05 03:54:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:50,448 INFO L225 Difference]: With dead ends: 138 [2021-06-05 03:54:50,448 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 03:54:50,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 03:54:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-05 03:54:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:54:50,449 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:54:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:50,450 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:54:50,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:54:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:50,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:50,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:50,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:50,650 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash 797921174, now seen corresponding path program 114 times [2021-06-05 03:54:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:50,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180773974] [2021-06-05 03:54:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:50,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180773974] [2021-06-05 03:54:50,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180773974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561057858] [2021-06-05 03:54:50,732 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:50,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:54:50,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:50,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:50,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561057858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:50,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:50,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:50,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719832580] [2021-06-05 03:54:50,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:50,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:50,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:50,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:50,965 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:51,170 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-06-05 03:54:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:51,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:51,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:51,171 INFO L225 Difference]: With dead ends: 142 [2021-06-05 03:54:51,171 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 03:54:51,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 03:54:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-06-05 03:54:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 03:54:51,172 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 03:54:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:51,172 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 03:54:51,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 03:54:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:51,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:51,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:51,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,373 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1417752294, now seen corresponding path program 115 times [2021-06-05 03:54:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:51,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645913893] [2021-06-05 03:54:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:51,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:51,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645913893] [2021-06-05 03:54:51,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645913893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697057854] [2021-06-05 03:54:51,467 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:51,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:51,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697057854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:51,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:51,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:51,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197269613] [2021-06-05 03:54:51,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:51,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:51,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:51,682 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:51,923 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-06-05 03:54:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:51,923 INFO L225 Difference]: With dead ends: 164 [2021-06-05 03:54:51,923 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 03:54:51,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 03:54:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-06-05 03:54:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:54:51,925 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:54:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:51,925 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:54:51,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:54:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:51,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:51,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:52,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 03:54:52,126 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1402291498, now seen corresponding path program 116 times [2021-06-05 03:54:52,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:52,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444541746] [2021-06-05 03:54:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:52,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:52,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444541746] [2021-06-05 03:54:52,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444541746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:52,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846999537] [2021-06-05 03:54:52,214 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:52,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:52,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:52,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:52,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846999537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:52,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:52,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:52,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425481734] [2021-06-05 03:54:52,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:52,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:52,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:52,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:52,433 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:52,730 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-06-05 03:54:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:54:52,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:52,731 INFO L225 Difference]: With dead ends: 151 [2021-06-05 03:54:52,731 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 03:54:52,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:54:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 03:54:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-06-05 03:54:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-06-05 03:54:52,733 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-06-05 03:54:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:52,733 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-06-05 03:54:52,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-06-05 03:54:52,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:52,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:52,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:52,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 03:54:52,941 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1810613706, now seen corresponding path program 117 times [2021-06-05 03:54:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:52,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977744843] [2021-06-05 03:54:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977744843] [2021-06-05 03:54:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977744843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28669019] [2021-06-05 03:54:53,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:53,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:53,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:53,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28669019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:53,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550163919] [2021-06-05 03:54:53,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:53,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:53,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:53,255 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:53,439 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-06-05 03:54:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:53,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:53,440 INFO L225 Difference]: With dead ends: 130 [2021-06-05 03:54:53,440 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 03:54:53,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 03:54:53,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-06-05 03:54:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-06-05 03:54:53,442 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-06-05 03:54:53,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:53,442 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-06-05 03:54:53,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-06-05 03:54:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:53,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:53,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:53,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 03:54:53,643 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -405059762, now seen corresponding path program 118 times [2021-06-05 03:54:53,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:53,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455226127] [2021-06-05 03:54:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455226127] [2021-06-05 03:54:53,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455226127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891244016] [2021-06-05 03:54:53,730 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:53,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:53,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:53,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891244016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:53,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:53,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:53,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353461912] [2021-06-05 03:54:53,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:53,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:53,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:53,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:53,952 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:54,184 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-06-05 03:54:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:54,185 INFO L225 Difference]: With dead ends: 153 [2021-06-05 03:54:54,185 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 03:54:54,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 03:54:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-05 03:54:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-06-05 03:54:54,186 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-06-05 03:54:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:54,186 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-06-05 03:54:54,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-06-05 03:54:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:54,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:54,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:54,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:54,389 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash -389598966, now seen corresponding path program 119 times [2021-06-05 03:54:54,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:54,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042760165] [2021-06-05 03:54:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:54,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:54,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042760165] [2021-06-05 03:54:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042760165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219672997] [2021-06-05 03:54:54,480 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:54,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:54,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:54,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219672997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:54,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:54,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:54,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416125896] [2021-06-05 03:54:54,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:54,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:54,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:54,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:54,707 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:54,968 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-06-05 03:54:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:54,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:54,968 INFO L225 Difference]: With dead ends: 140 [2021-06-05 03:54:54,969 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 03:54:54,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 290.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:54,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 03:54:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 03:54:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-06-05 03:54:54,970 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-06-05 03:54:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:54,970 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-06-05 03:54:54,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-06-05 03:54:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:54,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:54,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:55,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 03:54:55,193 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1741110998, now seen corresponding path program 120 times [2021-06-05 03:54:55,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:55,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593812514] [2021-06-05 03:54:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:55,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:55,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593812514] [2021-06-05 03:54:55,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593812514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146522029] [2021-06-05 03:54:55,281 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 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 [2021-06-05 03:54:55,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:55,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:55,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:55,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146522029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:55,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:55,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:55,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970932514] [2021-06-05 03:54:55,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:55,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:55,511 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:55,748 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-06-05 03:54:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:55,749 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:54:55,749 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:54:55,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:54:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-06-05 03:54:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-06-05 03:54:55,751 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-06-05 03:54:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:55,751 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-06-05 03:54:55,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-06-05 03:54:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:55,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:55,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:55,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 03:54:55,973 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1756571794, now seen corresponding path program 121 times [2021-06-05 03:54:55,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:55,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777580154] [2021-06-05 03:54:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:56,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:56,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777580154] [2021-06-05 03:54:56,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777580154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:56,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786907732] [2021-06-05 03:54:56,086 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 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 [2021-06-05 03:54:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:56,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:56,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:56,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786907732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:56,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:56,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:56,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620125092] [2021-06-05 03:54:56,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:56,364 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:56,672 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-06-05 03:54:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:56,673 INFO L225 Difference]: With dead ends: 156 [2021-06-05 03:54:56,673 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:54:56,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:54:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-06-05 03:54:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-06-05 03:54:56,675 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-06-05 03:54:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:56,675 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-06-05 03:54:56,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-06-05 03:54:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:56,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:56,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:56,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 03:54:56,876 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1966940696, now seen corresponding path program 122 times [2021-06-05 03:54:56,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:56,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592455888] [2021-06-05 03:54:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:56,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:56,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592455888] [2021-06-05 03:54:56,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592455888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:56,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634226336] [2021-06-05 03:54:56,957 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 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 [2021-06-05 03:54:56,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:54:56,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634226336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:57,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:57,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137487079] [2021-06-05 03:54:57,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:57,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:57,176 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:57,396 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-06-05 03:54:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:57,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:57,397 INFO L225 Difference]: With dead ends: 133 [2021-06-05 03:54:57,397 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 03:54:57,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 03:54:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-06-05 03:54:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-06-05 03:54:57,398 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-06-05 03:54:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:57,398 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-06-05 03:54:57,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-06-05 03:54:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:57,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:57,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:57,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:57,613 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1598555310, now seen corresponding path program 123 times [2021-06-05 03:54:57,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:57,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702014589] [2021-06-05 03:54:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:57,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702014589] [2021-06-05 03:54:57,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702014589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028043401] [2021-06-05 03:54:57,695 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 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 [2021-06-05 03:54:57,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:54:57,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:57,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:57,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028043401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:57,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:57,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:57,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689615340] [2021-06-05 03:54:57,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:57,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:57,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:57,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:57,924 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:58,088 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-06-05 03:54:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:58,088 INFO L225 Difference]: With dead ends: 128 [2021-06-05 03:54:58,088 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 03:54:58,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 03:54:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-06-05 03:54:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 03:54:58,090 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 03:54:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:58,090 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 03:54:58,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 03:54:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:58,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:58,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:58,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:54:58,291 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:58,291 INFO L82 PathProgramCache]: Analyzing trace with hash 480738518, now seen corresponding path program 124 times [2021-06-05 03:54:58,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:58,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493094718] [2021-06-05 03:54:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493094718] [2021-06-05 03:54:58,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493094718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957894994] [2021-06-05 03:54:58,377 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 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 [2021-06-05 03:54:58,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:54:58,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:58,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957894994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:58,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:58,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:58,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861108705] [2021-06-05 03:54:58,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:58,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:58,604 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:58,860 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-06-05 03:54:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:58,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:58,861 INFO L225 Difference]: With dead ends: 151 [2021-06-05 03:54:58,861 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 03:54:58,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 03:54:58,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-06-05 03:54:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:54:58,862 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:54:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:58,862 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:54:58,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:54:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:58,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:58,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:59,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 03:54:59,063 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash 496199314, now seen corresponding path program 125 times [2021-06-05 03:54:59,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:59,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538722775] [2021-06-05 03:54:59,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:59,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538722775] [2021-06-05 03:54:59,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538722775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451748349] [2021-06-05 03:54:59,159 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 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 [2021-06-05 03:54:59,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:54:59,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:59,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:54:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451748349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:54:59,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:54:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819010787] [2021-06-05 03:54:59,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:54:59,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:54:59,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:54:59,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:54:59,378 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:54:59,638 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-06-05 03:54:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:54:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:54:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:54:59,639 INFO L225 Difference]: With dead ends: 138 [2021-06-05 03:54:59,639 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 03:54:59,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:54:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 03:54:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-05 03:54:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:54:59,640 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:54:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:54:59,640 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:54:59,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:54:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:54:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:54:59,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:54:59,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:54:59,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 03:54:59,857 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:54:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:54:59,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1668058018, now seen corresponding path program 126 times [2021-06-05 03:54:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:54:59,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229312286] [2021-06-05 03:54:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:54:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:54:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:54:59,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:54:59,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229312286] [2021-06-05 03:54:59,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229312286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:54:59,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922055369] [2021-06-05 03:54:59,969 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 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 [2021-06-05 03:54:59,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:54:59,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:54:59,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:54:59,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922055369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:00,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:00,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368048207] [2021-06-05 03:55:00,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:00,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:00,242 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:00,475 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-05 03:55:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:00,476 INFO L225 Difference]: With dead ends: 148 [2021-06-05 03:55:00,476 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 03:55:00,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 03:55:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-05 03:55:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:55:00,477 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:55:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:00,477 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:55:00,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:55:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:00,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:00,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:00,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 03:55:00,678 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1652597222, now seen corresponding path program 127 times [2021-06-05 03:55:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:00,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369240337] [2021-06-05 03:55:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:00,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:00,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369240337] [2021-06-05 03:55:00,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369240337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041284672] [2021-06-05 03:55:00,767 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 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 [2021-06-05 03:55:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:00,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:00,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041284672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:00,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:00,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:00,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20615190] [2021-06-05 03:55:00,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:00,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:00,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:00,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:00,980 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:01,218 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-06-05 03:55:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:01,218 INFO L225 Difference]: With dead ends: 154 [2021-06-05 03:55:01,218 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 03:55:01,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 03:55:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-06-05 03:55:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 03:55:01,220 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 03:55:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:01,220 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 03:55:01,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 03:55:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:01,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:01,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:01,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 03:55:01,425 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:01,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1081142416, now seen corresponding path program 128 times [2021-06-05 03:55:01,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:01,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49963623] [2021-06-05 03:55:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:01,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:01,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49963623] [2021-06-05 03:55:01,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49963623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:01,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48668377] [2021-06-05 03:55:01,511 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 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 [2021-06-05 03:55:01,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:01,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:01,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:01,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48668377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:01,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:01,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:01,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749410758] [2021-06-05 03:55:01,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:01,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:01,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:01,732 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:01,942 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-06-05 03:55:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:01,942 INFO L225 Difference]: With dead ends: 131 [2021-06-05 03:55:01,942 INFO L226 Difference]: Without dead ends: 124 [2021-06-05 03:55:01,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-05 03:55:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-06-05 03:55:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-06-05 03:55:01,944 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-06-05 03:55:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:01,944 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-06-05 03:55:01,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-06-05 03:55:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:01,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:01,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:02,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 03:55:02,145 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1532817690, now seen corresponding path program 129 times [2021-06-05 03:55:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:02,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938432160] [2021-06-05 03:55:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:02,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:02,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938432160] [2021-06-05 03:55:02,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938432160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103059331] [2021-06-05 03:55:02,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 03:55:02,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:02,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:02,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:02,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103059331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:02,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:02,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:02,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388252204] [2021-06-05 03:55:02,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:02,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:02,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:02,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:02,477 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:02,710 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-06-05 03:55:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:02,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:02,710 INFO L225 Difference]: With dead ends: 165 [2021-06-05 03:55:02,710 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 03:55:02,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 03:55:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-06-05 03:55:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 03:55:02,712 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 03:55:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:02,712 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 03:55:02,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 03:55:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:02,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:02,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:02,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 03:55:02,913 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1548278486, now seen corresponding path program 130 times [2021-06-05 03:55:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290434383] [2021-06-05 03:55:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:03,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290434383] [2021-06-05 03:55:03,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290434383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367264560] [2021-06-05 03:55:03,003 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 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 [2021-06-05 03:55:03,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:03,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:03,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367264560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:03,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:03,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931001906] [2021-06-05 03:55:03,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:03,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:03,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:03,218 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:03,563 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-06-05 03:55:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:03,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:03,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:03,564 INFO L225 Difference]: With dead ends: 171 [2021-06-05 03:55:03,564 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 03:55:03,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 03:55:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-06-05 03:55:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-06-05 03:55:03,566 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-06-05 03:55:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:03,566 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-06-05 03:55:03,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-06-05 03:55:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:03,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:03,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:03,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 03:55:03,767 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2119733292, now seen corresponding path program 131 times [2021-06-05 03:55:03,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:03,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429681809] [2021-06-05 03:55:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:03,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:03,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429681809] [2021-06-05 03:55:03,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429681809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:03,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392766480] [2021-06-05 03:55:03,849 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 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 [2021-06-05 03:55:03,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:03,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:03,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:03,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392766480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:04,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:04,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976078762] [2021-06-05 03:55:04,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:04,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:04,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:04,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:04,065 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:04,282 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-06-05 03:55:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:04,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:04,282 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:55:04,282 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:55:04,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:55:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-06-05 03:55:04,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-06-05 03:55:04,284 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-06-05 03:55:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:04,284 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-06-05 03:55:04,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-06-05 03:55:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:04,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:04,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:04,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 03:55:04,485 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -737818470, now seen corresponding path program 132 times [2021-06-05 03:55:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:04,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036565223] [2021-06-05 03:55:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:04,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036565223] [2021-06-05 03:55:04,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036565223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491554170] [2021-06-05 03:55:04,562 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 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 [2021-06-05 03:55:04,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:55:04,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:04,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:04,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491554170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:04,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:04,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 03:55:04,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686059490] [2021-06-05 03:55:04,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:04,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:04,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:04,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:04,784 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:05,398 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-06-05 03:55:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:55:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 03:55:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:05,399 INFO L225 Difference]: With dead ends: 197 [2021-06-05 03:55:05,399 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 03:55:05,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 643.1ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:55:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 03:55:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-06-05 03:55:05,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-06-05 03:55:05,400 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-06-05 03:55:05,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:05,401 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-06-05 03:55:05,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:05,401 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-06-05 03:55:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:05,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:05,401 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:05,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:05,601 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:05,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1120538858, now seen corresponding path program 133 times [2021-06-05 03:55:05,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:05,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051952594] [2021-06-05 03:55:05,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:05,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051952594] [2021-06-05 03:55:05,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051952594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991290976] [2021-06-05 03:55:05,683 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 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 [2021-06-05 03:55:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:05,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:05,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991290976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:05,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:05,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 03:55:05,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095729947] [2021-06-05 03:55:05,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:05,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:05,912 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:06,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:06,317 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-06-05 03:55:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:55:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 03:55:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:06,318 INFO L225 Difference]: With dead ends: 160 [2021-06-05 03:55:06,318 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 03:55:06,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:55:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 03:55:06,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-06-05 03:55:06,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-06-05 03:55:06,319 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-06-05 03:55:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:06,319 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-06-05 03:55:06,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-06-05 03:55:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:06,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:06,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:06,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,520 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:06,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 958754970, now seen corresponding path program 134 times [2021-06-05 03:55:06,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:06,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007621275] [2021-06-05 03:55:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:06,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:06,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007621275] [2021-06-05 03:55:06,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007621275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577695987] [2021-06-05 03:55:06,605 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:06,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:06,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:06,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577695987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:06,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:06,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 03:55:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761296548] [2021-06-05 03:55:06,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:06,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:06,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:06,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:06,859 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:07,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:07,601 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-06-05 03:55:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 03:55:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 03:55:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:07,601 INFO L225 Difference]: With dead ends: 223 [2021-06-05 03:55:07,601 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 03:55:07,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 781.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 03:55:07,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 03:55:07,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-06-05 03:55:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:55:07,603 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:55:07,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:07,603 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:55:07,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:55:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:07,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:07,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:07,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:07,804 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash 974215766, now seen corresponding path program 135 times [2021-06-05 03:55:07,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:07,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954422504] [2021-06-05 03:55:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:07,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:07,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954422504] [2021-06-05 03:55:07,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954422504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:07,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324259142] [2021-06-05 03:55:07,890 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:07,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:07,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324259142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:08,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:08,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 03:55:08,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198979719] [2021-06-05 03:55:08,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 03:55:08,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 03:55:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:55:08,197 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:09,046 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-06-05 03:55:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:55:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-06-05 03:55:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:09,047 INFO L225 Difference]: With dead ends: 214 [2021-06-05 03:55:09,047 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 03:55:09,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 03:55:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 03:55:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-06-05 03:55:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:55:09,049 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:55:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:09,049 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:55:09,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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) [2021-06-05 03:55:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:55:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:09,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:09,049 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:09,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:09,253 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1581877714, now seen corresponding path program 136 times [2021-06-05 03:55:09,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:09,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883989190] [2021-06-05 03:55:09,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:09,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:09,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883989190] [2021-06-05 03:55:09,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883989190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933845903] [2021-06-05 03:55:09,336 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:09,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:09,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:09,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933845903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:09,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:09,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819563941] [2021-06-05 03:55:09,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:09,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:09,561 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:09,737 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-06-05 03:55:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:09,738 INFO L225 Difference]: With dead ends: 137 [2021-06-05 03:55:09,738 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 03:55:09,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 03:55:09,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-06-05 03:55:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-06-05 03:55:09,739 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-06-05 03:55:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:09,739 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-06-05 03:55:09,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-06-05 03:55:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:09,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:09,739 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:09,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 03:55:09,940 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash 811172182, now seen corresponding path program 137 times [2021-06-05 03:55:09,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:09,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448446005] [2021-06-05 03:55:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:10,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448446005] [2021-06-05 03:55:10,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448446005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799038861] [2021-06-05 03:55:10,026 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:10,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:10,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:10,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:10,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:10,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799038861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:10,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:10,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:10,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753021682] [2021-06-05 03:55:10,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:10,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:10,211 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:10,939 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-06-05 03:55:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:55:10,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:10,940 INFO L225 Difference]: With dead ends: 235 [2021-06-05 03:55:10,940 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 03:55:10,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:55:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 03:55:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-06-05 03:55:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 03:55:10,941 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 03:55:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:10,942 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 03:55:10,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 03:55:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:10,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:10,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:11,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 03:55:11,142 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 826632978, now seen corresponding path program 138 times [2021-06-05 03:55:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:11,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177054298] [2021-06-05 03:55:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:11,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177054298] [2021-06-05 03:55:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177054298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481323258] [2021-06-05 03:55:11,228 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:11,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:55:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:11,314 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:11,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:11,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481323258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:11,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:11,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:11,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932285652] [2021-06-05 03:55:11,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:11,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:11,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:11,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:11,474 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:12,157 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-06-05 03:55:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:55:12,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:12,157 INFO L225 Difference]: With dead ends: 235 [2021-06-05 03:55:12,157 INFO L226 Difference]: Without dead ends: 228 [2021-06-05 03:55:12,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:55:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-05 03:55:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-06-05 03:55:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 03:55:12,159 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 03:55:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:12,159 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 03:55:12,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 03:55:12,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:12,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:12,160 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:12,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 03:55:12,382 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1398087784, now seen corresponding path program 139 times [2021-06-05 03:55:12,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:12,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931455689] [2021-06-05 03:55:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:12,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:12,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931455689] [2021-06-05 03:55:12,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931455689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321388490] [2021-06-05 03:55:12,474 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:12,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:12,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321388490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:12,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:12,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:12,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823263567] [2021-06-05 03:55:12,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:12,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:12,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:12,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:12,700 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:13,429 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-06-05 03:55:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 03:55:13,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:13,429 INFO L225 Difference]: With dead ends: 201 [2021-06-05 03:55:13,430 INFO L226 Difference]: Without dead ends: 194 [2021-06-05 03:55:13,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 736.4ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:55:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-05 03:55:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-06-05 03:55:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:55:13,432 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:55:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:13,432 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:55:13,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:55:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:13,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:13,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:13,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 03:55:13,633 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1459463978, now seen corresponding path program 140 times [2021-06-05 03:55:13,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:13,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247059776] [2021-06-05 03:55:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:13,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:13,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247059776] [2021-06-05 03:55:13,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247059776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:13,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755477431] [2021-06-05 03:55:13,713 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:13,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:13,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:13,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:13,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755477431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:13,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:13,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:13,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722582315] [2021-06-05 03:55:13,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:13,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:13,938 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:14,188 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-06-05 03:55:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:14,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:14,189 INFO L225 Difference]: With dead ends: 157 [2021-06-05 03:55:14,189 INFO L226 Difference]: Without dead ends: 150 [2021-06-05 03:55:14,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-05 03:55:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-06-05 03:55:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:55:14,191 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:55:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:14,191 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:55:14,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:55:14,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:14,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:14,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:14,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 03:55:14,397 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1842184366, now seen corresponding path program 141 times [2021-06-05 03:55:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:14,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585754805] [2021-06-05 03:55:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:14,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:14,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585754805] [2021-06-05 03:55:14,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585754805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:14,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717971502] [2021-06-05 03:55:14,476 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:14,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:14,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717971502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:14,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:14,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940454177] [2021-06-05 03:55:14,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:14,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:14,701 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:14,880 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-06-05 03:55:14,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:14,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:14,881 INFO L225 Difference]: With dead ends: 161 [2021-06-05 03:55:14,881 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 03:55:14,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 03:55:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-06-05 03:55:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 03:55:14,882 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 03:55:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:14,882 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 03:55:14,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 03:55:14,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:14,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:14,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:15,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 03:55:15,085 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:15,085 INFO L82 PathProgramCache]: Analyzing trace with hash 237109462, now seen corresponding path program 142 times [2021-06-05 03:55:15,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:15,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754157570] [2021-06-05 03:55:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:15,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:15,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754157570] [2021-06-05 03:55:15,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754157570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:15,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056399293] [2021-06-05 03:55:15,171 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:15,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:15,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:15,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:15,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056399293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:15,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:15,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:15,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797275493] [2021-06-05 03:55:15,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:15,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:15,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:15,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:15,409 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:15,739 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-06-05 03:55:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:15,740 INFO L225 Difference]: With dead ends: 183 [2021-06-05 03:55:15,740 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 03:55:15,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 03:55:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-06-05 03:55:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 03:55:15,742 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 03:55:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:15,742 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 03:55:15,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 03:55:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:15,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:15,742 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:15,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:15,948 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:15,948 INFO L82 PathProgramCache]: Analyzing trace with hash 252570258, now seen corresponding path program 143 times [2021-06-05 03:55:15,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:15,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552552515] [2021-06-05 03:55:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:16,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552552515] [2021-06-05 03:55:16,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552552515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915162889] [2021-06-05 03:55:16,031 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:16,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:16,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915162889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:16,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:16,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594196880] [2021-06-05 03:55:16,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:16,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:16,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:16,247 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:16,483 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-06-05 03:55:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:16,484 INFO L225 Difference]: With dead ends: 170 [2021-06-05 03:55:16,484 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 03:55:16,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 03:55:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-06-05 03:55:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:55:16,485 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:55:16,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:16,485 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:55:16,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:55:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:16,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:16,486 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:16,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,686 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash 860232206, now seen corresponding path program 144 times [2021-06-05 03:55:16,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:16,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246147561] [2021-06-05 03:55:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246147561] [2021-06-05 03:55:16,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246147561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288501129] [2021-06-05 03:55:16,765 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:16,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:16,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:16,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:16,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288501129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:16,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:16,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562656926] [2021-06-05 03:55:16,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:16,950 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:17,657 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-06-05 03:55:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:55:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:17,658 INFO L225 Difference]: With dead ends: 215 [2021-06-05 03:55:17,658 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 03:55:17,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 727.3ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:55:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 03:55:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-06-05 03:55:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-06-05 03:55:17,659 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-06-05 03:55:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:17,659 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-06-05 03:55:17,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-06-05 03:55:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:17,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:17,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:17,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:17,860 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:17,860 INFO L82 PathProgramCache]: Analyzing trace with hash -829491834, now seen corresponding path program 145 times [2021-06-05 03:55:17,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:17,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834856281] [2021-06-05 03:55:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:17,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:17,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834856281] [2021-06-05 03:55:17,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834856281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810554225] [2021-06-05 03:55:17,941 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810554225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:18,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:18,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858253305] [2021-06-05 03:55:18,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:18,183 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:18,389 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-06-05 03:55:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:18,389 INFO L225 Difference]: With dead ends: 126 [2021-06-05 03:55:18,390 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 03:55:18,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:18,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 03:55:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-06-05 03:55:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 03:55:18,391 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 03:55:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:18,391 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 03:55:18,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 03:55:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:18,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:18,391 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:18,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:18,592 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1249801994, now seen corresponding path program 146 times [2021-06-05 03:55:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:18,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820849677] [2021-06-05 03:55:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:18,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820849677] [2021-06-05 03:55:18,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820849677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:18,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056683855] [2021-06-05 03:55:18,682 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:18,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056683855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:18,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:18,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167257360] [2021-06-05 03:55:18,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:18,914 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:19,183 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-06-05 03:55:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:19,184 INFO L225 Difference]: With dead ends: 149 [2021-06-05 03:55:19,184 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 03:55:19,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:19,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 03:55:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-06-05 03:55:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 03:55:19,186 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 03:55:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:19,186 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 03:55:19,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 03:55:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:19,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:19,186 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:19,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:19,386 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1265262790, now seen corresponding path program 147 times [2021-06-05 03:55:19,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:19,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066900511] [2021-06-05 03:55:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:19,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066900511] [2021-06-05 03:55:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066900511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776605614] [2021-06-05 03:55:19,469 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:19,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:19,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:19,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776605614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:19,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:19,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:19,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706027231] [2021-06-05 03:55:19,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:19,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:19,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:19,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:19,685 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:19,910 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-06-05 03:55:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:19,910 INFO L225 Difference]: With dead ends: 136 [2021-06-05 03:55:19,910 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 03:55:19,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 03:55:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-06-05 03:55:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-06-05 03:55:19,912 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-06-05 03:55:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:19,912 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-06-05 03:55:19,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-06-05 03:55:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:19,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:19,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:20,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:20,113 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:20,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:20,113 INFO L82 PathProgramCache]: Analyzing trace with hash -898994542, now seen corresponding path program 148 times [2021-06-05 03:55:20,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:20,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117081177] [2021-06-05 03:55:20,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:20,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:20,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117081177] [2021-06-05 03:55:20,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117081177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:20,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544029688] [2021-06-05 03:55:20,200 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:20,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:20,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:20,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:20,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544029688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:20,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:20,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:20,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426287561] [2021-06-05 03:55:20,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:20,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:20,429 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:20,689 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-06-05 03:55:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:20,690 INFO L225 Difference]: With dead ends: 146 [2021-06-05 03:55:20,690 INFO L226 Difference]: Without dead ends: 139 [2021-06-05 03:55:20,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-05 03:55:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-06-05 03:55:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 03:55:20,691 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 03:55:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:20,691 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 03:55:20,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 03:55:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:20,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:20,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:20,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 03:55:20,892 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash -883533746, now seen corresponding path program 149 times [2021-06-05 03:55:20,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:20,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163269881] [2021-06-05 03:55:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:20,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:20,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163269881] [2021-06-05 03:55:20,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163269881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:20,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465599372] [2021-06-05 03:55:20,979 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:20,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:20,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:21,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465599372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:21,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:21,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113674366] [2021-06-05 03:55:21,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:21,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:21,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:21,197 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:21,402 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-06-05 03:55:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:21,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:21,403 INFO L225 Difference]: With dead ends: 152 [2021-06-05 03:55:21,403 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 03:55:21,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 03:55:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-06-05 03:55:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-06-05 03:55:21,404 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-06-05 03:55:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:21,404 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-06-05 03:55:21,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-06-05 03:55:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:21,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:21,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:21,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 03:55:21,626 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash -312078940, now seen corresponding path program 150 times [2021-06-05 03:55:21,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:21,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466823145] [2021-06-05 03:55:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:21,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466823145] [2021-06-05 03:55:21,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466823145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361573352] [2021-06-05 03:55:21,714 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:21,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:21,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:21,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:21,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:21,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361573352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:21,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:21,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:21,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052750350] [2021-06-05 03:55:21,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:21,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:21,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:21,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:21,951 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:22,098 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-06-05 03:55:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:22,099 INFO L225 Difference]: With dead ends: 129 [2021-06-05 03:55:22,099 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 03:55:22,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 03:55:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-06-05 03:55:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-06-05 03:55:22,100 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-06-05 03:55:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:22,100 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-06-05 03:55:22,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-06-05 03:55:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:22,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:22,101 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:22,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 03:55:22,301 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 56306446, now seen corresponding path program 151 times [2021-06-05 03:55:22,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:22,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910020481] [2021-06-05 03:55:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:22,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:22,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910020481] [2021-06-05 03:55:22,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910020481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307718646] [2021-06-05 03:55:22,380 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:22,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:22,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307718646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:22,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:22,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:22,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078864842] [2021-06-05 03:55:22,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:22,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:22,601 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:22,766 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-06-05 03:55:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:22,767 INFO L225 Difference]: With dead ends: 130 [2021-06-05 03:55:22,767 INFO L226 Difference]: Without dead ends: 123 [2021-06-05 03:55:22,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-06-05 03:55:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-06-05 03:55:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-05 03:55:22,768 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-05 03:55:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:22,768 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-05 03:55:22,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-05 03:55:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:22,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:22,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:22,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:22,969 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:22,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2135600274, now seen corresponding path program 152 times [2021-06-05 03:55:22,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:22,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138458891] [2021-06-05 03:55:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:23,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138458891] [2021-06-05 03:55:23,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138458891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773063952] [2021-06-05 03:55:23,055 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:23,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:23,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:23,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:23,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773063952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:23,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:23,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823143747] [2021-06-05 03:55:23,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:23,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:23,278 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:23,454 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-06-05 03:55:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:23,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:23,454 INFO L225 Difference]: With dead ends: 153 [2021-06-05 03:55:23,454 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 03:55:23,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 03:55:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-06-05 03:55:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 03:55:23,456 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 03:55:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:23,456 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 03:55:23,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 03:55:23,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:23,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:23,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:23,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 03:55:23,657 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2143906226, now seen corresponding path program 153 times [2021-06-05 03:55:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706197211] [2021-06-05 03:55:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706197211] [2021-06-05 03:55:23,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706197211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451866183] [2021-06-05 03:55:23,742 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:23,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:55:23,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:23,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451866183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:23,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:23,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963909457] [2021-06-05 03:55:23,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:23,997 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:24,220 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-06-05 03:55:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:24,221 INFO L225 Difference]: With dead ends: 140 [2021-06-05 03:55:24,221 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 03:55:24,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 03:55:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-06-05 03:55:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-06-05 03:55:24,222 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-06-05 03:55:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:24,222 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-06-05 03:55:24,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-06-05 03:55:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:24,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:24,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:24,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:24,429 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:24,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:24,429 INFO L82 PathProgramCache]: Analyzing trace with hash -13196262, now seen corresponding path program 154 times [2021-06-05 03:55:24,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:24,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852059742] [2021-06-05 03:55:24,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:24,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:24,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852059742] [2021-06-05 03:55:24,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852059742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:24,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356632190] [2021-06-05 03:55:24,514 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:24,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:24,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356632190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:24,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926349919] [2021-06-05 03:55:24,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:24,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:24,748 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:25,072 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-06-05 03:55:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:25,073 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:55:25,073 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:55:25,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:55:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-06-05 03:55:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-06-05 03:55:25,075 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-06-05 03:55:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:25,075 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-06-05 03:55:25,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-06-05 03:55:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:25,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:25,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:25,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:25,276 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:25,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2264534, now seen corresponding path program 155 times [2021-06-05 03:55:25,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:25,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592549443] [2021-06-05 03:55:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:25,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:25,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592549443] [2021-06-05 03:55:25,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592549443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735000796] [2021-06-05 03:55:25,382 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:25,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:25,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:25,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735000796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:25,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:25,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:25,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785671289] [2021-06-05 03:55:25,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:25,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:25,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:25,599 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:25,783 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-06-05 03:55:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:25,784 INFO L225 Difference]: With dead ends: 156 [2021-06-05 03:55:25,784 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:55:25,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:55:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-06-05 03:55:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-05 03:55:25,785 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-05 03:55:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:25,785 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-05 03:55:25,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-05 03:55:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:25,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:25,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:25,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-06-05 03:55:25,986 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash 573719340, now seen corresponding path program 156 times [2021-06-05 03:55:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:25,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260604652] [2021-06-05 03:55:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:26,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260604652] [2021-06-05 03:55:26,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260604652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436642040] [2021-06-05 03:55:26,064 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:26,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:26,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:26,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436642040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:26,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:26,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450701520] [2021-06-05 03:55:26,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:26,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:26,289 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:26,455 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-06-05 03:55:26,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:26,456 INFO L225 Difference]: With dead ends: 133 [2021-06-05 03:55:26,456 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 03:55:26,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 03:55:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-06-05 03:55:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-06-05 03:55:26,457 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-06-05 03:55:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:26,457 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-06-05 03:55:26,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:26,458 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-06-05 03:55:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:26,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:26,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:26,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,658 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1107287850, now seen corresponding path program 157 times [2021-06-05 03:55:26,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:26,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358465063] [2021-06-05 03:55:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358465063] [2021-06-05 03:55:26,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358465063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599994036] [2021-06-05 03:55:26,746 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:26,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599994036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:26,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:26,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:26,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335788282] [2021-06-05 03:55:26,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:26,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:26,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:26,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:26,969 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:27,218 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-06-05 03:55:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:27,219 INFO L225 Difference]: With dead ends: 168 [2021-06-05 03:55:27,219 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 03:55:27,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 03:55:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-06-05 03:55:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-06-05 03:55:27,221 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-06-05 03:55:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:27,221 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-06-05 03:55:27,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-06-05 03:55:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:27,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:27,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:27,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:27,437 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1091827054, now seen corresponding path program 158 times [2021-06-05 03:55:27,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:27,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755194736] [2021-06-05 03:55:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:27,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:27,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755194736] [2021-06-05 03:55:27,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755194736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389240292] [2021-06-05 03:55:27,521 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:27,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:27,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:27,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:27,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389240292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:27,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:27,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:27,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302060267] [2021-06-05 03:55:27,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:27,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:27,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:27,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:27,775 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:28,086 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-06-05 03:55:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:28,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:28,087 INFO L225 Difference]: With dead ends: 174 [2021-06-05 03:55:28,087 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 03:55:28,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 03:55:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-06-05 03:55:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-06-05 03:55:28,089 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-06-05 03:55:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:28,089 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-06-05 03:55:28,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-06-05 03:55:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:28,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:28,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:28,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 03:55:28,290 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash -520372248, now seen corresponding path program 159 times [2021-06-05 03:55:28,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:28,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298000476] [2021-06-05 03:55:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:28,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298000476] [2021-06-05 03:55:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298000476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:28,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821797895] [2021-06-05 03:55:28,371 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:28,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:28,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:28,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821797895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:28,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:28,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:28,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206322727] [2021-06-05 03:55:28,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:28,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:28,595 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:28,778 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-06-05 03:55:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:28,778 INFO L225 Difference]: With dead ends: 153 [2021-06-05 03:55:28,778 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 03:55:28,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 03:55:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-06-05 03:55:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-06-05 03:55:28,780 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-06-05 03:55:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:28,780 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-06-05 03:55:28,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:28,780 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-06-05 03:55:28,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:28,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:28,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:28,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 03:55:28,981 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:28,981 INFO L82 PathProgramCache]: Analyzing trace with hash 917043286, now seen corresponding path program 160 times [2021-06-05 03:55:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:28,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296114323] [2021-06-05 03:55:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:29,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:29,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296114323] [2021-06-05 03:55:29,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296114323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059001103] [2021-06-05 03:55:29,064 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:29,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:29,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:29,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059001103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:29,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:29,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:29,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67644983] [2021-06-05 03:55:29,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:29,245 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:29,895 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-06-05 03:55:29,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:55:29,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:29,896 INFO L225 Difference]: With dead ends: 196 [2021-06-05 03:55:29,896 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:55:29,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 03:55:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:55:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-06-05 03:55:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-06-05 03:55:29,898 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-06-05 03:55:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:29,898 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-06-05 03:55:29,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-06-05 03:55:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:29,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:29,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:30,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 03:55:30,113 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash 534322898, now seen corresponding path program 161 times [2021-06-05 03:55:30,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:30,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740005440] [2021-06-05 03:55:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:30,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:30,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740005440] [2021-06-05 03:55:30,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740005440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109392421] [2021-06-05 03:55:30,191 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:30,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:30,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:30,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109392421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:30,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:30,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:30,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221845141] [2021-06-05 03:55:30,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:30,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:30,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:30,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:30,517 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:30,968 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-06-05 03:55:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:55:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:30,969 INFO L225 Difference]: With dead ends: 156 [2021-06-05 03:55:30,969 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:55:30,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:55:30,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:55:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-06-05 03:55:30,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 03:55:30,970 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 03:55:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 03:55:30,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 03:55:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:30,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:30,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:31,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 03:55:31,171 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1681350570, now seen corresponding path program 162 times [2021-06-05 03:55:31,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:31,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523744109] [2021-06-05 03:55:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:31,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523744109] [2021-06-05 03:55:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523744109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548856123] [2021-06-05 03:55:31,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:31,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:31,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:31,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:31,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548856123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:31,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:31,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:31,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9104801] [2021-06-05 03:55:31,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:31,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:31,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:31,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:31,473 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:32,104 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-06-05 03:55:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 03:55:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:32,104 INFO L225 Difference]: With dead ends: 206 [2021-06-05 03:55:32,104 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 03:55:32,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:55:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 03:55:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-06-05 03:55:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-05 03:55:32,106 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-06-05 03:55:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:32,106 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-05 03:55:32,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-05 03:55:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:32,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:32,106 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:32,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 03:55:32,307 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:32,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1665889774, now seen corresponding path program 163 times [2021-06-05 03:55:32,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:32,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397702821] [2021-06-05 03:55:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:32,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:32,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397702821] [2021-06-05 03:55:32,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397702821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075107365] [2021-06-05 03:55:32,388 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:32,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075107365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:32,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:32,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:32,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149886364] [2021-06-05 03:55:32,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:32,899 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:33,557 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-06-05 03:55:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:55:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:33,558 INFO L225 Difference]: With dead ends: 197 [2021-06-05 03:55:33,558 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 03:55:33,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:55:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 03:55:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-06-05 03:55:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-05 03:55:33,560 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-06-05 03:55:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:33,560 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-05 03:55:33,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-05 03:55:33,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:33,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:33,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:33,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:33,761 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1058227826, now seen corresponding path program 164 times [2021-06-05 03:55:33,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:33,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793302222] [2021-06-05 03:55:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:33,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:33,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793302222] [2021-06-05 03:55:33,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793302222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:33,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793030216] [2021-06-05 03:55:33,856 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:33,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:33,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:33,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:33,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:34,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793030216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:34,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:34,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940440521] [2021-06-05 03:55:34,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:34,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:34,071 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:34,312 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-06-05 03:55:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:34,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:34,313 INFO L225 Difference]: With dead ends: 158 [2021-06-05 03:55:34,313 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 03:55:34,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 03:55:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-06-05 03:55:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 03:55:34,314 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 03:55:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:34,314 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 03:55:34,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 03:55:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:34,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:34,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:34,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:34,515 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1703746494, now seen corresponding path program 165 times [2021-06-05 03:55:34,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:34,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073552400] [2021-06-05 03:55:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:34,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:34,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073552400] [2021-06-05 03:55:34,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073552400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949626878] [2021-06-05 03:55:34,633 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:34,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:55:34,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:34,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949626878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:34,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:34,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:34,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434189245] [2021-06-05 03:55:34,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:34,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:34,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:34,876 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:35,065 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-05 03:55:35,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:35,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:35,065 INFO L225 Difference]: With dead ends: 128 [2021-06-05 03:55:35,065 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 03:55:35,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 03:55:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-06-05 03:55:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 03:55:35,067 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 03:55:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:35,067 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 03:55:35,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 03:55:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:35,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:35,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:35,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,268 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:35,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:35,268 INFO L82 PathProgramCache]: Analyzing trace with hash 375547334, now seen corresponding path program 166 times [2021-06-05 03:55:35,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:35,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116158579] [2021-06-05 03:55:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:35,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:35,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116158579] [2021-06-05 03:55:35,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116158579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750232829] [2021-06-05 03:55:35,352 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:35,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750232829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:35,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:35,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:35,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262716473] [2021-06-05 03:55:35,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:35,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:35,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:35,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:35,578 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:35,775 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-06-05 03:55:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:35,776 INFO L225 Difference]: With dead ends: 151 [2021-06-05 03:55:35,776 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 03:55:35,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 295.5ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 03:55:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-06-05 03:55:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-06-05 03:55:35,777 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-06-05 03:55:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:35,777 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-06-05 03:55:35,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-06-05 03:55:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:35,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:35,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:35,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:35,989 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:35,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash 391008130, now seen corresponding path program 167 times [2021-06-05 03:55:35,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:35,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919093201] [2021-06-05 03:55:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:36,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:36,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919093201] [2021-06-05 03:55:36,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919093201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:36,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446152363] [2021-06-05 03:55:36,075 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:36,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:36,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:36,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:36,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:36,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446152363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:36,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:36,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750655584] [2021-06-05 03:55:36,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:36,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:36,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:36,297 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:36,515 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-06-05 03:55:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:36,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:36,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:36,516 INFO L225 Difference]: With dead ends: 138 [2021-06-05 03:55:36,516 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 03:55:36,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:55:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 03:55:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-06-05 03:55:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 03:55:36,517 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-06-05 03:55:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:36,518 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 03:55:36,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 03:55:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:36,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:36,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:36,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:36,718 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:36,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1773249202, now seen corresponding path program 168 times [2021-06-05 03:55:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078166026] [2021-06-05 03:55:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:36,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078166026] [2021-06-05 03:55:36,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078166026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:36,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691030209] [2021-06-05 03:55:36,828 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:36,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:55:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691030209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:37,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:37,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444080386] [2021-06-05 03:55:37,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:37,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:37,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:37,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:37,112 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:37,384 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-06-05 03:55:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:37,385 INFO L225 Difference]: With dead ends: 152 [2021-06-05 03:55:37,385 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 03:55:37,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 03:55:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-06-05 03:55:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-06-05 03:55:37,386 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-06-05 03:55:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:37,386 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-06-05 03:55:37,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-06-05 03:55:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:37,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:37,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:37,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:37,587 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:37,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:37,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1757788406, now seen corresponding path program 169 times [2021-06-05 03:55:37,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:37,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302648502] [2021-06-05 03:55:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:37,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302648502] [2021-06-05 03:55:37,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302648502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782028935] [2021-06-05 03:55:37,677 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:37,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782028935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:37,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:37,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:37,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968461844] [2021-06-05 03:55:37,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:37,892 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:38,181 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-06-05 03:55:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:55:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:38,182 INFO L225 Difference]: With dead ends: 158 [2021-06-05 03:55:38,182 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 03:55:38,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 03:55:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-06-05 03:55:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-05 03:55:38,183 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-05 03:55:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:38,183 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-05 03:55:38,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-05 03:55:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:38,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:38,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:38,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 03:55:38,384 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1186333600, now seen corresponding path program 170 times [2021-06-05 03:55:38,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:38,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996203564] [2021-06-05 03:55:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:38,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:38,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996203564] [2021-06-05 03:55:38,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996203564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:38,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182084481] [2021-06-05 03:55:38,465 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:38,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:38,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:38,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:38,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182084481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:38,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:38,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:38,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462075716] [2021-06-05 03:55:38,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:38,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:38,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:38,694 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:38,868 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-06-05 03:55:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:38,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:38,868 INFO L225 Difference]: With dead ends: 132 [2021-06-05 03:55:38,868 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 03:55:38,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 03:55:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-06-05 03:55:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-06-05 03:55:38,870 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-06-05 03:55:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:38,870 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-06-05 03:55:38,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-06-05 03:55:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:38,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:38,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:39,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 03:55:39,070 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:39,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1427626506, now seen corresponding path program 171 times [2021-06-05 03:55:39,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:39,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640187932] [2021-06-05 03:55:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:39,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:39,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640187932] [2021-06-05 03:55:39,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640187932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:39,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472925580] [2021-06-05 03:55:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:39,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:55:39,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472925580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:39,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:39,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177313848] [2021-06-05 03:55:39,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:39,379 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:39,703 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-06-05 03:55:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:39,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:39,704 INFO L225 Difference]: With dead ends: 173 [2021-06-05 03:55:39,704 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 03:55:39,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 03:55:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-06-05 03:55:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 03:55:39,705 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-05 03:55:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:39,705 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 03:55:39,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 03:55:39,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:39,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:39,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:39,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 03:55:39,906 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:39,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:39,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1443087302, now seen corresponding path program 172 times [2021-06-05 03:55:39,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:39,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884125930] [2021-06-05 03:55:39,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:39,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:39,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884125930] [2021-06-05 03:55:39,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884125930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:39,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124594231] [2021-06-05 03:55:39,995 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:40,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:40,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:40,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:40,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124594231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:40,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:40,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:40,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968733512] [2021-06-05 03:55:40,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:40,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:40,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:40,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:40,212 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:40,523 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-06-05 03:55:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:55:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:40,523 INFO L225 Difference]: With dead ends: 179 [2021-06-05 03:55:40,524 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 03:55:40,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:55:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 03:55:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-06-05 03:55:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 03:55:40,525 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 03:55:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:40,525 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 03:55:40,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 03:55:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:40,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:40,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:40,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:40,726 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2014542108, now seen corresponding path program 173 times [2021-06-05 03:55:40,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:40,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103939964] [2021-06-05 03:55:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:40,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:40,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103939964] [2021-06-05 03:55:40,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103939964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:40,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293216796] [2021-06-05 03:55:40,808 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:40,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:41,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293216796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:41,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:41,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505876572] [2021-06-05 03:55:41,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:41,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:41,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:41,067 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:41,324 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-06-05 03:55:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:41,325 INFO L225 Difference]: With dead ends: 156 [2021-06-05 03:55:41,325 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 03:55:41,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 03:55:41,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-06-05 03:55:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 03:55:41,326 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 03:55:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:41,326 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 03:55:41,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:41,326 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 03:55:41,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:41,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:41,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:41,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:41,527 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686530, now seen corresponding path program 174 times [2021-06-05 03:55:41,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:41,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660042039] [2021-06-05 03:55:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:41,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660042039] [2021-06-05 03:55:41,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660042039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932400969] [2021-06-05 03:55:41,609 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:41,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:41,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:41,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:41,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932400969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:41,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:41,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:41,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466780138] [2021-06-05 03:55:41,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:41,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:41,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:41,852 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:42,043 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-06-05 03:55:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:42,043 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:55:42,043 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:55:42,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:55:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-06-05 03:55:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 03:55:42,045 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 03:55:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:42,045 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 03:55:42,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 03:55:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:42,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:42,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:42,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 03:55:42,246 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:42,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1981542510, now seen corresponding path program 175 times [2021-06-05 03:55:42,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:42,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472988993] [2021-06-05 03:55:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:42,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:42,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472988993] [2021-06-05 03:55:42,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472988993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:42,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002313719] [2021-06-05 03:55:42,341 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:42,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002313719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:42,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:42,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:42,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729723120] [2021-06-05 03:55:42,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:42,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:42,567 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:42,879 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-06-05 03:55:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:55:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:42,879 INFO L225 Difference]: With dead ends: 173 [2021-06-05 03:55:42,880 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 03:55:42,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 03:55:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-06-05 03:55:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-06-05 03:55:42,881 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-06-05 03:55:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:42,881 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-06-05 03:55:42,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-06-05 03:55:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:42,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:42,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:43,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:43,082 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1966081714, now seen corresponding path program 176 times [2021-06-05 03:55:43,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:43,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784409841] [2021-06-05 03:55:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:43,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:43,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784409841] [2021-06-05 03:55:43,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784409841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:43,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850894563] [2021-06-05 03:55:43,167 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:43,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:43,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:43,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850894563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:43,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:43,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441221104] [2021-06-05 03:55:43,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:43,381 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:43,657 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-06-05 03:55:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:55:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:43,657 INFO L225 Difference]: With dead ends: 179 [2021-06-05 03:55:43,657 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 03:55:43,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:43,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 03:55:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-06-05 03:55:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-06-05 03:55:43,659 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-06-05 03:55:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:43,659 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-06-05 03:55:43,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-06-05 03:55:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:43,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:43,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:43,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:43,860 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1394626908, now seen corresponding path program 177 times [2021-06-05 03:55:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:43,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806505484] [2021-06-05 03:55:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:43,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:43,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806505484] [2021-06-05 03:55:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806505484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:43,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853208767] [2021-06-05 03:55:43,939 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:43,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:43,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:43,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:43,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:44,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853208767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:44,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:44,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475359575] [2021-06-05 03:55:44,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:44,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:44,153 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:44,393 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-06-05 03:55:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:55:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:44,393 INFO L225 Difference]: With dead ends: 152 [2021-06-05 03:55:44,393 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 03:55:44,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 03:55:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-06-05 03:55:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-06-05 03:55:44,395 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-06-05 03:55:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:44,395 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-06-05 03:55:44,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-06-05 03:55:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:44,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:44,395 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:44,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:44,596 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:44,596 INFO L82 PathProgramCache]: Analyzing trace with hash 42788626, now seen corresponding path program 178 times [2021-06-05 03:55:44,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:44,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31639447] [2021-06-05 03:55:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:44,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:44,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31639447] [2021-06-05 03:55:44,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31639447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:44,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289758055] [2021-06-05 03:55:44,681 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:44,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:44,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:44,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:44,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:44,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289758055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:44,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:44,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:44,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913646801] [2021-06-05 03:55:44,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:44,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:44,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:44,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:44,887 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:45,180 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-06-05 03:55:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:45,181 INFO L225 Difference]: With dead ends: 175 [2021-06-05 03:55:45,181 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 03:55:45,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 03:55:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-06-05 03:55:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-06-05 03:55:45,182 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-06-05 03:55:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:45,182 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-06-05 03:55:45,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-06-05 03:55:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:45,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:45,182 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:45,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:45,383 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash -339931762, now seen corresponding path program 179 times [2021-06-05 03:55:45,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:45,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956400025] [2021-06-05 03:55:45,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:45,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:45,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956400025] [2021-06-05 03:55:45,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956400025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083568235] [2021-06-05 03:55:45,461 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:45,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:45,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:45,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:45,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083568235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:45,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:45,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:45,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625403421] [2021-06-05 03:55:45,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:45,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:45,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:45,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:45,635 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:45,950 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-06-05 03:55:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:45,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:45,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:45,951 INFO L225 Difference]: With dead ends: 163 [2021-06-05 03:55:45,951 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 03:55:45,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:55:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 03:55:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-06-05 03:55:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-06-05 03:55:45,952 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-06-05 03:55:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:45,952 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-06-05 03:55:45,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-06-05 03:55:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:45,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:45,953 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:46,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:46,153 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1739362066, now seen corresponding path program 180 times [2021-06-05 03:55:46,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:46,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267636268] [2021-06-05 03:55:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:46,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267636268] [2021-06-05 03:55:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267636268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691895646] [2021-06-05 03:55:46,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:46,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:46,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:46,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:46,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691895646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:46,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:46,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:46,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076808664] [2021-06-05 03:55:46,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:46,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:46,483 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:46,927 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-06-05 03:55:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:55:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:46,933 INFO L225 Difference]: With dead ends: 208 [2021-06-05 03:55:46,933 INFO L226 Difference]: Without dead ends: 201 [2021-06-05 03:55:46,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:55:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-06-05 03:55:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-06-05 03:55:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-06-05 03:55:46,935 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-06-05 03:55:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:46,935 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-06-05 03:55:46,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-06-05 03:55:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:46,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:46,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:47,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:47,149 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:47,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1754822862, now seen corresponding path program 181 times [2021-06-05 03:55:47,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:47,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550831004] [2021-06-05 03:55:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550831004] [2021-06-05 03:55:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550831004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630327508] [2021-06-05 03:55:47,232 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:47,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:47,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:47,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630327508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:47,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:47,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996087438] [2021-06-05 03:55:47,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:47,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:47,596 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:47,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:47,974 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-06-05 03:55:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:47,975 INFO L225 Difference]: With dead ends: 198 [2021-06-05 03:55:47,975 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 03:55:47,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:55:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 03:55:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-06-05 03:55:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-06-05 03:55:47,976 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-06-05 03:55:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:47,976 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-06-05 03:55:47,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-06-05 03:55:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:47,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:47,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:48,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 03:55:48,193 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1932482486, now seen corresponding path program 182 times [2021-06-05 03:55:48,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:48,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514015524] [2021-06-05 03:55:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:48,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514015524] [2021-06-05 03:55:48,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514015524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895527905] [2021-06-05 03:55:48,287 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:48,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:48,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 03:55:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:48,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895527905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:48,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:48,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:48,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993944040] [2021-06-05 03:55:48,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:48,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:48,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:48,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:48,541 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:48,718 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-06-05 03:55:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:55:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:48,719 INFO L225 Difference]: With dead ends: 164 [2021-06-05 03:55:48,719 INFO L226 Difference]: Without dead ends: 157 [2021-06-05 03:55:48,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 03:55:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-05 03:55:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-06-05 03:55:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-06-05 03:55:48,721 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-06-05 03:55:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:48,721 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-06-05 03:55:48,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-06-05 03:55:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:48,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:48,721 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 03:55:48,925 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 672760770, now seen corresponding path program 183 times [2021-06-05 03:55:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177109018] [2021-06-05 03:55:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:49,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:49,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177109018] [2021-06-05 03:55:49,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177109018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:49,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935605546] [2021-06-05 03:55:49,006 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:49,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:49,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:49,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:49,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935605546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:49,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:49,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:49,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131756490] [2021-06-05 03:55:49,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:49,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:49,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:49,212 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:49,461 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-06-05 03:55:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:55:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:49,462 INFO L225 Difference]: With dead ends: 135 [2021-06-05 03:55:49,462 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 03:55:49,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 03:55:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-06-05 03:55:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 03:55:49,464 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 03:55:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:49,464 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 03:55:49,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 03:55:49,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:49,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:49,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:49,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:49,669 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1542912698, now seen corresponding path program 184 times [2021-06-05 03:55:49,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:49,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797878600] [2021-06-05 03:55:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:49,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797878600] [2021-06-05 03:55:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797878600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:49,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218690479] [2021-06-05 03:55:49,760 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:49,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:49,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:49,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:49,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:49,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218690479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:49,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:49,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:49,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914796104] [2021-06-05 03:55:49,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:49,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:49,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:49,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:49,948 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:50,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:50,307 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-06-05 03:55:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:55:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:50,308 INFO L225 Difference]: With dead ends: 178 [2021-06-05 03:55:50,308 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 03:55:50,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:55:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 03:55:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-06-05 03:55:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 03:55:50,309 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-05 03:55:50,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:50,309 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 03:55:50,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 03:55:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:50,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:50,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:50,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 03:55:50,513 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1527451902, now seen corresponding path program 185 times [2021-06-05 03:55:50,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:50,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226829141] [2021-06-05 03:55:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:50,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:50,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226829141] [2021-06-05 03:55:50,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226829141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:50,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036191191] [2021-06-05 03:55:50,601 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:50,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:55:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:50,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:50,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036191191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:50,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:50,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:50,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146232989] [2021-06-05 03:55:50,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:50,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:50,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:50,802 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:51,147 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-06-05 03:55:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:55:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:51,148 INFO L225 Difference]: With dead ends: 170 [2021-06-05 03:55:51,148 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 03:55:51,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 03:55:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-06-05 03:55:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 03:55:51,149 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 03:55:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:51,149 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 03:55:51,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 03:55:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:51,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:51,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:51,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:51,350 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash 603258062, now seen corresponding path program 186 times [2021-06-05 03:55:51,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:51,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983511378] [2021-06-05 03:55:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983511378] [2021-06-05 03:55:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983511378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173328722] [2021-06-05 03:55:51,434 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:51,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:51,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:51,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173328722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:51,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:51,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:51,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129890306] [2021-06-05 03:55:51,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:51,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:51,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:51,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:51,625 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:51,933 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-06-05 03:55:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:51,933 INFO L225 Difference]: With dead ends: 170 [2021-06-05 03:55:51,933 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 03:55:51,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 03:55:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-06-05 03:55:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-06-05 03:55:51,935 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-06-05 03:55:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-06-05 03:55:51,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-06-05 03:55:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:51,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:51,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:52,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 03:55:52,136 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash 618718858, now seen corresponding path program 187 times [2021-06-05 03:55:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:52,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705093044] [2021-06-05 03:55:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:52,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:52,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705093044] [2021-06-05 03:55:52,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705093044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:52,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924832988] [2021-06-05 03:55:52,226 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:52,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:52,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924832988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:52,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:52,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697073728] [2021-06-05 03:55:52,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:52,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:52,698 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:53,034 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-06-05 03:55:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:53,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:53,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:53,035 INFO L225 Difference]: With dead ends: 182 [2021-06-05 03:55:53,035 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 03:55:53,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:55:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 03:55:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-06-05 03:55:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-06-05 03:55:53,037 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-06-05 03:55:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:53,037 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-06-05 03:55:53,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:53,037 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-06-05 03:55:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:53,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:53,037 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:53,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,238 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1190173664, now seen corresponding path program 188 times [2021-06-05 03:55:53,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:53,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860991120] [2021-06-05 03:55:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:53,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:53,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860991120] [2021-06-05 03:55:53,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860991120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6766354] [2021-06-05 03:55:53,319 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:53,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:53,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:53,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:53,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6766354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:53,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:53,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 03:55:53,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128153455] [2021-06-05 03:55:53,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 03:55:53,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 03:55:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:55:53,686 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:54,006 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-06-05 03:55:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:55:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 03:55:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:54,007 INFO L225 Difference]: With dead ends: 140 [2021-06-05 03:55:54,007 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 03:55:54,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:55:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 03:55:54,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 03:55:54,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-06-05 03:55:54,008 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-06-05 03:55:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:54,009 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-06-05 03:55:54,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-06-05 03:55:54,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:54,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:54,009 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:54,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 03:55:54,209 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:54,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash 668199066, now seen corresponding path program 189 times [2021-06-05 03:55:54,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:54,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171327187] [2021-06-05 03:55:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:54,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:54,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171327187] [2021-06-05 03:55:54,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171327187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:54,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190083074] [2021-06-05 03:55:54,291 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:54,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:55:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:54,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:54,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:54,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190083074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:54,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:54,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055861383] [2021-06-05 03:55:54,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:54,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:54,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:54,488 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:55,149 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-06-05 03:55:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 03:55:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:55,149 INFO L225 Difference]: With dead ends: 201 [2021-06-05 03:55:55,149 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 03:55:55,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 636.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 03:55:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 03:55:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-06-05 03:55:55,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-06-05 03:55:55,151 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-06-05 03:55:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:55,151 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-06-05 03:55:55,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-06-05 03:55:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:55,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:55,151 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:55,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:55,352 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash 285478678, now seen corresponding path program 190 times [2021-06-05 03:55:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:55,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235265617] [2021-06-05 03:55:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:55,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:55,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235265617] [2021-06-05 03:55:55,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235265617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845763855] [2021-06-05 03:55:55,441 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:55,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:55:55,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:55,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:55,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845763855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:55,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:55,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:55,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10384032] [2021-06-05 03:55:55,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:55,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:55,668 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:56,152 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-06-05 03:55:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:55:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:56,152 INFO L225 Difference]: With dead ends: 161 [2021-06-05 03:55:56,153 INFO L226 Difference]: Without dead ends: 154 [2021-06-05 03:55:56,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:55:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-05 03:55:56,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-06-05 03:55:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-06-05 03:55:56,154 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-06-05 03:55:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:56,154 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-06-05 03:55:56,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-06-05 03:55:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:56,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:56,154 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:56,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:56,355 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:56,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:56,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1930194790, now seen corresponding path program 191 times [2021-06-05 03:55:56,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:56,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979380889] [2021-06-05 03:55:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:56,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:56,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979380889] [2021-06-05 03:55:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979380889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:56,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433760613] [2021-06-05 03:55:56,440 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:56,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:55:56,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:56,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:56,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433760613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:56,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:56,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:56,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182136788] [2021-06-05 03:55:56,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:56,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:56,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:56,672 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:57,424 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-06-05 03:55:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 03:55:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:57,424 INFO L225 Difference]: With dead ends: 220 [2021-06-05 03:55:57,424 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 03:55:57,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 03:55:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 03:55:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-06-05 03:55:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-06-05 03:55:57,426 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-06-05 03:55:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:57,426 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-06-05 03:55:57,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:57,426 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-06-05 03:55:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:57,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:57,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:57,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 03:55:57,627 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1914733994, now seen corresponding path program 192 times [2021-06-05 03:55:57,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:57,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428364871] [2021-06-05 03:55:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:57,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:57,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428364871] [2021-06-05 03:55:57,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428364871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:57,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930054429] [2021-06-05 03:55:57,725 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:57,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:55:57,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:57,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:57,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:57,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930054429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:57,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:57,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:57,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149393241] [2021-06-05 03:55:57,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:57,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:57,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:57,930 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:58,598 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-06-05 03:55:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:55:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:58,599 INFO L225 Difference]: With dead ends: 210 [2021-06-05 03:55:58,599 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 03:55:58,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:55:58,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 03:55:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-06-05 03:55:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-06-05 03:55:58,600 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-06-05 03:55:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:58,600 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-06-05 03:55:58,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-06-05 03:55:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:58,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:58,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:58,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 03:55:58,801 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash -206055594, now seen corresponding path program 193 times [2021-06-05 03:55:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:58,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534091964] [2021-06-05 03:55:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534091964] [2021-06-05 03:55:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534091964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648193653] [2021-06-05 03:55:58,881 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:58,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:58,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:59,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648193653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:59,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:59,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764678195] [2021-06-05 03:55:59,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:59,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:59,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:59,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:59,070 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:55:59,354 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-06-05 03:55:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:55:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:55:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:55:59,355 INFO L225 Difference]: With dead ends: 186 [2021-06-05 03:55:59,355 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 03:55:59,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:55:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 03:55:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-06-05 03:55:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-06-05 03:55:59,356 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-06-05 03:55:59,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:55:59,356 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-06-05 03:55:59,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:55:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-06-05 03:55:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:55:59,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:55:59,356 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:55:59,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 03:55:59,557 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:55:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:55:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash -588775982, now seen corresponding path program 194 times [2021-06-05 03:55:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:55:59,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085296444] [2021-06-05 03:55:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:55:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:55:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:59,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:55:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085296444] [2021-06-05 03:55:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085296444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838777703] [2021-06-05 03:55:59,636 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:55:59,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:55:59,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:55:59,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:55:59,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:55:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:55:59,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838777703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:55:59,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:55:59,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:55:59,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006390877] [2021-06-05 03:55:59,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:55:59,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:55:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:55:59,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:55:59,863 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:00,258 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-06-05 03:56:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:00,258 INFO L225 Difference]: With dead ends: 170 [2021-06-05 03:56:00,258 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 03:56:00,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 03:56:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-06-05 03:56:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 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) [2021-06-05 03:56:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-06-05 03:56:00,260 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-06-05 03:56:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:00,260 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-06-05 03:56:00,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-06-05 03:56:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:00,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:00,260 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:00,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 03:56:00,461 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1490517846, now seen corresponding path program 195 times [2021-06-05 03:56:00,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:00,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892275095] [2021-06-05 03:56:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:00,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892275095] [2021-06-05 03:56:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892275095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985762394] [2021-06-05 03:56:00,544 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:00,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:00,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:00,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985762394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:00,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:00,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:00,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621021181] [2021-06-05 03:56:00,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:00,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:00,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:00,738 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:01,250 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-06-05 03:56:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 03:56:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:01,251 INFO L225 Difference]: With dead ends: 217 [2021-06-05 03:56:01,251 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 03:56:01,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:56:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 03:56:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-06-05 03:56:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-06-05 03:56:01,253 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-06-05 03:56:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:01,253 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-06-05 03:56:01,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-06-05 03:56:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:01,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:01,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:01,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 03:56:01,473 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1505978642, now seen corresponding path program 196 times [2021-06-05 03:56:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263816399] [2021-06-05 03:56:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:01,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263816399] [2021-06-05 03:56:01,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263816399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:01,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715951689] [2021-06-05 03:56:01,574 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:01,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:01,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:01,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:01,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715951689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175671817] [2021-06-05 03:56:01,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:01,785 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:02,234 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-06-05 03:56:02,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:56:02,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:02,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:02,235 INFO L225 Difference]: With dead ends: 206 [2021-06-05 03:56:02,235 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 03:56:02,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 03:56:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-06-05 03:56:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-06-05 03:56:02,237 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-06-05 03:56:02,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:02,237 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-06-05 03:56:02,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-06-05 03:56:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:02,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:02,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:02,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:02,460 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 423916550, now seen corresponding path program 197 times [2021-06-05 03:56:02,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:02,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79531646] [2021-06-05 03:56:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:02,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79531646] [2021-06-05 03:56:02,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79531646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143450354] [2021-06-05 03:56:02,548 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:02,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:02,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143450354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:02,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:02,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:02,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921350942] [2021-06-05 03:56:02,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:02,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:02,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:02,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:02,777 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:03,076 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-06-05 03:56:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:03,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:03,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:03,077 INFO L225 Difference]: With dead ends: 145 [2021-06-05 03:56:03,077 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 03:56:03,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 03:56:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-06-05 03:56:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-06-05 03:56:03,078 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-06-05 03:56:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:03,078 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-06-05 03:56:03,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-06-05 03:56:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:03,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:03,079 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:03,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 03:56:03,279 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:03,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1791756918, now seen corresponding path program 198 times [2021-06-05 03:56:03,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:03,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788441290] [2021-06-05 03:56:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:03,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788441290] [2021-06-05 03:56:03,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788441290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484013981] [2021-06-05 03:56:03,365 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:03,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:03,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:03,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:03,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:03,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484013981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:03,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:03,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414412999] [2021-06-05 03:56:03,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:03,584 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:04,007 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-06-05 03:56:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:56:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:04,008 INFO L225 Difference]: With dead ends: 190 [2021-06-05 03:56:04,008 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 03:56:04,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 03:56:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-06-05 03:56:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 03:56:04,010 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 03:56:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:04,010 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 03:56:04,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 03:56:04,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:04,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:04,011 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:04,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 03:56:04,225 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1776296122, now seen corresponding path program 199 times [2021-06-05 03:56:04,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:04,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770745793] [2021-06-05 03:56:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:04,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:04,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770745793] [2021-06-05 03:56:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770745793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020159520] [2021-06-05 03:56:04,310 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:04,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020159520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:04,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:04,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254065756] [2021-06-05 03:56:04,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:04,633 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:05,016 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-06-05 03:56:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:05,016 INFO L225 Difference]: With dead ends: 181 [2021-06-05 03:56:05,016 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 03:56:05,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:56:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 03:56:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-06-05 03:56:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 03:56:05,018 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-05 03:56:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:05,018 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 03:56:05,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 03:56:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:05,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:05,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:05,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:05,219 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 354413842, now seen corresponding path program 200 times [2021-06-05 03:56:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:05,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142880375] [2021-06-05 03:56:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:05,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142880375] [2021-06-05 03:56:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142880375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:05,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532011720] [2021-06-05 03:56:05,309 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:05,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:05,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:05,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:05,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:05,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532011720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:05,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:05,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:05,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439247566] [2021-06-05 03:56:05,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:05,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:05,518 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:05,873 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-06-05 03:56:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:05,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:05,873 INFO L225 Difference]: With dead ends: 186 [2021-06-05 03:56:05,873 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 03:56:05,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 03:56:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-06-05 03:56:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-06-05 03:56:05,875 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-06-05 03:56:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:05,875 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-06-05 03:56:05,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-06-05 03:56:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:05,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:05,875 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:06,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 03:56:06,077 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash 369874638, now seen corresponding path program 201 times [2021-06-05 03:56:06,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:06,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401437773] [2021-06-05 03:56:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:06,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401437773] [2021-06-05 03:56:06,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401437773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524066748] [2021-06-05 03:56:06,158 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:06,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:06,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:06,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524066748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:06,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178581318] [2021-06-05 03:56:06,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:06,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:06,361 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:06,687 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-06-05 03:56:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:06,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:06,688 INFO L225 Difference]: With dead ends: 199 [2021-06-05 03:56:06,688 INFO L226 Difference]: Without dead ends: 192 [2021-06-05 03:56:06,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-05 03:56:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-06-05 03:56:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-06-05 03:56:06,689 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-06-05 03:56:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:06,689 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-06-05 03:56:06,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-06-05 03:56:06,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:06,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:06,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:06,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 03:56:06,890 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash 941329444, now seen corresponding path program 202 times [2021-06-05 03:56:06,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:06,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420162488] [2021-06-05 03:56:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:06,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:06,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420162488] [2021-06-05 03:56:06,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420162488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:06,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561729884] [2021-06-05 03:56:06,968 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:06,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:06,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561729884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288437952] [2021-06-05 03:56:07,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:07,299 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:07,621 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-06-05 03:56:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:07,622 INFO L225 Difference]: With dead ends: 152 [2021-06-05 03:56:07,622 INFO L226 Difference]: Without dead ends: 145 [2021-06-05 03:56:07,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:56:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-06-05 03:56:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-06-05 03:56:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 03:56:07,623 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-06-05 03:56:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:07,623 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 03:56:07,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 03:56:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:07,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:07,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:07,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:07,824 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1487538330, now seen corresponding path program 203 times [2021-06-05 03:56:07,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:07,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922771690] [2021-06-05 03:56:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:07,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:07,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922771690] [2021-06-05 03:56:07,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922771690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:07,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054792131] [2021-06-05 03:56:07,908 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:07,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:07,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:07,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054792131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822713000] [2021-06-05 03:56:08,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:08,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:08,126 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:08,495 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-06-05 03:56:08,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:08,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:08,495 INFO L225 Difference]: With dead ends: 185 [2021-06-05 03:56:08,495 INFO L226 Difference]: Without dead ends: 171 [2021-06-05 03:56:08,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-05 03:56:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-06-05 03:56:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 03:56:08,497 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-06-05 03:56:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:08,497 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 03:56:08,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 03:56:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:08,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:08,497 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:08,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 03:56:08,697 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:08,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1104817942, now seen corresponding path program 204 times [2021-06-05 03:56:08,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:08,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538642145] [2021-06-05 03:56:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538642145] [2021-06-05 03:56:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538642145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90249125] [2021-06-05 03:56:08,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:08,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:08,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:08,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:08,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90249125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:08,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:08,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:08,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507289190] [2021-06-05 03:56:08,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:08,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:08,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:08,988 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:09,376 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-06-05 03:56:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:56:09,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:09,376 INFO L225 Difference]: With dead ends: 170 [2021-06-05 03:56:09,376 INFO L226 Difference]: Without dead ends: 163 [2021-06-05 03:56:09,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:56:09,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-05 03:56:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-06-05 03:56:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-06-05 03:56:09,378 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-06-05 03:56:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:09,378 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-06-05 03:56:09,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-06-05 03:56:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:09,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:09,378 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:09,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:09,579 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1110855526, now seen corresponding path program 205 times [2021-06-05 03:56:09,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:09,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148352385] [2021-06-05 03:56:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:09,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148352385] [2021-06-05 03:56:09,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148352385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:09,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906135179] [2021-06-05 03:56:09,662 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:09,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:09,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:09,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906135179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:09,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:09,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:09,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938408122] [2021-06-05 03:56:09,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:09,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:09,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:09,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:09,934 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:10,565 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-06-05 03:56:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:56:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:10,565 INFO L225 Difference]: With dead ends: 217 [2021-06-05 03:56:10,565 INFO L226 Difference]: Without dead ends: 210 [2021-06-05 03:56:10,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:56:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-05 03:56:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-06-05 03:56:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-06-05 03:56:10,567 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-06-05 03:56:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:10,567 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-06-05 03:56:10,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-06-05 03:56:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:10,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:10,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:10,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 03:56:10,768 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1095394730, now seen corresponding path program 206 times [2021-06-05 03:56:10,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:10,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220940809] [2021-06-05 03:56:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:10,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:10,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220940809] [2021-06-05 03:56:10,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220940809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:10,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136947509] [2021-06-05 03:56:10,851 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:10,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:10,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:10,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:10,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136947509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:11,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:11,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:11,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496072439] [2021-06-05 03:56:11,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:11,055 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:11,542 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-06-05 03:56:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:56:11,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:11,543 INFO L225 Difference]: With dead ends: 206 [2021-06-05 03:56:11,543 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 03:56:11,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 03:56:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-06-05 03:56:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-06-05 03:56:11,544 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-06-05 03:56:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:11,544 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-06-05 03:56:11,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-06-05 03:56:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:11,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:11,545 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:11,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:11,745 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:11,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:11,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2117510474, now seen corresponding path program 207 times [2021-06-05 03:56:11,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:11,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088884962] [2021-06-05 03:56:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:11,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088884962] [2021-06-05 03:56:11,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088884962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:11,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875147641] [2021-06-05 03:56:11,824 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:11,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:11,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:11,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:12,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875147641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:12,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:12,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:12,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328798049] [2021-06-05 03:56:12,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:12,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:12,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:12,038 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:12,370 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-06-05 03:56:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:12,371 INFO L225 Difference]: With dead ends: 150 [2021-06-05 03:56:12,371 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 03:56:12,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:56:12,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 03:56:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-06-05 03:56:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 03:56:12,372 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 03:56:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:12,373 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 03:56:12,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 03:56:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:12,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:12,373 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:12,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 03:56:12,573 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:12,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:12,573 INFO L82 PathProgramCache]: Analyzing trace with hash -98162994, now seen corresponding path program 208 times [2021-06-05 03:56:12,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:12,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328363194] [2021-06-05 03:56:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:12,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:12,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328363194] [2021-06-05 03:56:12,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328363194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:12,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847020863] [2021-06-05 03:56:12,658 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:12,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:12,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:12,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:12,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847020863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:12,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:12,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:12,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688022957] [2021-06-05 03:56:12,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:12,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:12,884 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:13,396 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-06-05 03:56:13,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 03:56:13,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:13,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:13,396 INFO L225 Difference]: With dead ends: 195 [2021-06-05 03:56:13,396 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 03:56:13,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 483.5ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:56:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 03:56:13,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-06-05 03:56:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 03:56:13,398 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 03:56:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:13,398 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 03:56:13,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 03:56:13,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:13,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:13,398 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:13,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 03:56:13,599 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:13,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:13,599 INFO L82 PathProgramCache]: Analyzing trace with hash -82702198, now seen corresponding path program 209 times [2021-06-05 03:56:13,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:13,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555741989] [2021-06-05 03:56:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:13,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:13,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555741989] [2021-06-05 03:56:13,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555741989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:13,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4669877] [2021-06-05 03:56:13,709 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:13,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:13,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:13,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4669877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:13,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:13,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:13,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938894838] [2021-06-05 03:56:13,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:13,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:13,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:13,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:13,969 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:14,400 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-06-05 03:56:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 03:56:14,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:14,401 INFO L225 Difference]: With dead ends: 186 [2021-06-05 03:56:14,401 INFO L226 Difference]: Without dead ends: 179 [2021-06-05 03:56:14,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:14,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-05 03:56:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-06-05 03:56:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-06-05 03:56:14,403 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-06-05 03:56:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:14,403 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-06-05 03:56:14,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-06-05 03:56:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:14,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:14,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:14,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:14,603 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2048007766, now seen corresponding path program 210 times [2021-06-05 03:56:14,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:14,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544295091] [2021-06-05 03:56:14,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:14,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544295091] [2021-06-05 03:56:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544295091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081847375] [2021-06-05 03:56:14,688 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:14,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:14,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:14,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:14,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081847375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:14,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:14,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:14,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235324572] [2021-06-05 03:56:14,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:14,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:14,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:14,974 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:15,434 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-06-05 03:56:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:15,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:15,435 INFO L225 Difference]: With dead ends: 195 [2021-06-05 03:56:15,435 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 03:56:15,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:56:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 03:56:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-06-05 03:56:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-06-05 03:56:15,437 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-06-05 03:56:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:15,437 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-06-05 03:56:15,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-06-05 03:56:15,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:15,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:15,437 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:15,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 03:56:15,638 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:15,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2063468562, now seen corresponding path program 211 times [2021-06-05 03:56:15,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:15,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12669090] [2021-06-05 03:56:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:15,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12669090] [2021-06-05 03:56:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12669090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285395465] [2021-06-05 03:56:15,721 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:15,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:16,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285395465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:16,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:16,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:16,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436629361] [2021-06-05 03:56:16,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:16,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:16,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:16,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:16,042 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:16,467 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-06-05 03:56:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:16,467 INFO L225 Difference]: With dead ends: 209 [2021-06-05 03:56:16,467 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 03:56:16,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:56:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 03:56:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-06-05 03:56:16,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-06-05 03:56:16,469 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-06-05 03:56:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:16,469 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-06-05 03:56:16,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-06-05 03:56:16,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:16,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:16,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:16,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:16,670 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:16,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1660043928, now seen corresponding path program 212 times [2021-06-05 03:56:16,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:16,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987617253] [2021-06-05 03:56:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:16,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:16,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987617253] [2021-06-05 03:56:16,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987617253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:16,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519100623] [2021-06-05 03:56:16,752 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:16,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:16,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:16,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:17,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519100623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:17,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:17,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:17,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493241316] [2021-06-05 03:56:17,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:17,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:17,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:17,069 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:17,427 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-06-05 03:56:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:17,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:17,428 INFO L225 Difference]: With dead ends: 162 [2021-06-05 03:56:17,428 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 03:56:17,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 03:56:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-06-05 03:56:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-06-05 03:56:17,430 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-06-05 03:56:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:17,430 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-06-05 03:56:17,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-06-05 03:56:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:17,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:17,431 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:17,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:17,652 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1291658542, now seen corresponding path program 213 times [2021-06-05 03:56:17,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:17,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465485682] [2021-06-05 03:56:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:17,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465485682] [2021-06-05 03:56:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465485682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:17,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172840487] [2021-06-05 03:56:17,731 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:17,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:17,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:17,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:17,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172840487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:17,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:17,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506469242] [2021-06-05 03:56:17,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:17,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:17,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:17,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:17,953 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:18,158 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-06-05 03:56:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:56:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:18,159 INFO L225 Difference]: With dead ends: 127 [2021-06-05 03:56:18,159 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 03:56:18,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 03:56:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-06-05 03:56:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 03:56:18,160 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 03:56:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:18,160 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 03:56:18,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 03:56:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:18,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:18,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:18,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 03:56:18,361 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:18,361 INFO L82 PathProgramCache]: Analyzing trace with hash 787635286, now seen corresponding path program 214 times [2021-06-05 03:56:18,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:18,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090201178] [2021-06-05 03:56:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:18,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090201178] [2021-06-05 03:56:18,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090201178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108945977] [2021-06-05 03:56:18,448 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:18,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:18,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:18,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:18,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108945977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:18,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:18,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132189220] [2021-06-05 03:56:18,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:18,664 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:19,082 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-06-05 03:56:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:19,082 INFO L225 Difference]: With dead ends: 162 [2021-06-05 03:56:19,082 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 03:56:19,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 03:56:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-06-05 03:56:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 03:56:19,084 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 03:56:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:19,084 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 03:56:19,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 03:56:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:19,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:19,084 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:19,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:19,284 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash 803096082, now seen corresponding path program 215 times [2021-06-05 03:56:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:19,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247300679] [2021-06-05 03:56:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:19,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:19,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247300679] [2021-06-05 03:56:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247300679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:19,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494605158] [2021-06-05 03:56:19,388 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:19,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:19,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:19,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494605158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:19,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:19,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854596561] [2021-06-05 03:56:19,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:19,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:19,595 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:19,938 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-06-05 03:56:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:56:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:19,938 INFO L225 Difference]: With dead ends: 158 [2021-06-05 03:56:19,938 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 03:56:19,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:56:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 03:56:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-06-05 03:56:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-06-05 03:56:19,940 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-06-05 03:56:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:19,940 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-06-05 03:56:19,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-06-05 03:56:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:19,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:19,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:20,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 03:56:20,140 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1361161250, now seen corresponding path program 216 times [2021-06-05 03:56:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:20,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266935831] [2021-06-05 03:56:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:20,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:20,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266935831] [2021-06-05 03:56:20,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266935831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:20,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996053899] [2021-06-05 03:56:20,226 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:20,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:20,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:20,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:20,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996053899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:20,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:20,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:20,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206358455] [2021-06-05 03:56:20,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:20,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:20,435 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:20,774 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-06-05 03:56:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:56:20,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:20,775 INFO L225 Difference]: With dead ends: 158 [2021-06-05 03:56:20,775 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 03:56:20,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 03:56:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-06-05 03:56:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-06-05 03:56:20,776 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-06-05 03:56:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:20,776 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-06-05 03:56:20,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-06-05 03:56:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:20,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:20,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:20,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 03:56:20,977 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:20,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:20,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1345700454, now seen corresponding path program 217 times [2021-06-05 03:56:20,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:20,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035118255] [2021-06-05 03:56:20,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:21,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:21,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035118255] [2021-06-05 03:56:21,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035118255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333868889] [2021-06-05 03:56:21,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:21,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:21,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333868889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:21,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:21,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933919954] [2021-06-05 03:56:21,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:21,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:21,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:21,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:21,272 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:21,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:21,567 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-06-05 03:56:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 03:56:21,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:21,567 INFO L225 Difference]: With dead ends: 169 [2021-06-05 03:56:21,568 INFO L226 Difference]: Without dead ends: 162 [2021-06-05 03:56:21,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-06-05 03:56:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-06-05 03:56:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-06-05 03:56:21,569 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-06-05 03:56:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:21,569 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-06-05 03:56:21,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-06-05 03:56:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:21,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:21,569 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:21,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 03:56:21,770 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:21,770 INFO L82 PathProgramCache]: Analyzing trace with hash -774245648, now seen corresponding path program 218 times [2021-06-05 03:56:21,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:21,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390642536] [2021-06-05 03:56:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:21,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:21,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390642536] [2021-06-05 03:56:21,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390642536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:21,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332883027] [2021-06-05 03:56:21,852 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:21,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:21,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:21,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:21,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:22,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332883027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:22,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:22,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638196569] [2021-06-05 03:56:22,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:22,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:22,056 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:22,314 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-06-05 03:56:22,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:56:22,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:22,315 INFO L225 Difference]: With dead ends: 142 [2021-06-05 03:56:22,315 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 03:56:22,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 03:56:22,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 03:56:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-06-05 03:56:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-05 03:56:22,316 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-06-05 03:56:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:22,316 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-05 03:56:22,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-05 03:56:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:22,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:22,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:22,517 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1839714458, now seen corresponding path program 219 times [2021-06-05 03:56:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958546714] [2021-06-05 03:56:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:22,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:22,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958546714] [2021-06-05 03:56:22,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958546714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419140423] [2021-06-05 03:56:22,603 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:22,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:56:22,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:22,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419140423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054317213] [2021-06-05 03:56:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:22,824 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:23,122 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-06-05 03:56:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:23,123 INFO L225 Difference]: With dead ends: 176 [2021-06-05 03:56:23,123 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 03:56:23,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 03:56:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 03:56:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-06-05 03:56:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-06-05 03:56:23,125 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-06-05 03:56:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:23,125 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-06-05 03:56:23,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,125 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-06-05 03:56:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:23,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:23,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:23,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,325 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:23,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1855175254, now seen corresponding path program 220 times [2021-06-05 03:56:23,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:23,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578279781] [2021-06-05 03:56:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:23,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578279781] [2021-06-05 03:56:23,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578279781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825955516] [2021-06-05 03:56:23,413 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:23,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:23,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:23,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:23,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:23,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825955516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:23,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:23,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:23,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073778292] [2021-06-05 03:56:23,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:23,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:23,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:23,611 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:23,987 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-06-05 03:56:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:23,988 INFO L225 Difference]: With dead ends: 188 [2021-06-05 03:56:23,988 INFO L226 Difference]: Without dead ends: 181 [2021-06-05 03:56:23,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 03:56:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-06-05 03:56:23,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-06-05 03:56:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-06-05 03:56:23,990 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-06-05 03:56:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:23,990 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-06-05 03:56:23,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-06-05 03:56:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:23,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:23,990 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:24,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 03:56:24,191 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:24,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1868337236, now seen corresponding path program 221 times [2021-06-05 03:56:24,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:24,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398934299] [2021-06-05 03:56:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:24,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398934299] [2021-06-05 03:56:24,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398934299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933218860] [2021-06-05 03:56:24,274 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:24,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:56:24,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:24,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933218860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:24,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:24,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:24,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758575573] [2021-06-05 03:56:24,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:24,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:24,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:24,484 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:24,849 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-06-05 03:56:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 03:56:24,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:24,849 INFO L225 Difference]: With dead ends: 160 [2021-06-05 03:56:24,849 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 03:56:24,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 03:56:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-06-05 03:56:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-06-05 03:56:24,851 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-06-05 03:56:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:24,851 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-06-05 03:56:24,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-06-05 03:56:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:24,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:24,851 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:25,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:25,052 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1265651738, now seen corresponding path program 5 times [2021-06-05 03:56:25,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:25,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790996410] [2021-06-05 03:56:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:25,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:25,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790996410] [2021-06-05 03:56:25,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790996410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081437350] [2021-06-05 03:56:25,157 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:25,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:25,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:25,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 03:56:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:25,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081437350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:25,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 03:56:25,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139959991] [2021-06-05 03:56:25,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 03:56:25,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:25,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 03:56:25,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:56:25,274 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:25,488 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-06-05 03:56:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:56:25,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:56:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:25,489 INFO L225 Difference]: With dead ends: 147 [2021-06-05 03:56:25,489 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 03:56:25,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:56:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 03:56:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-06-05 03:56:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 03:56:25,491 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 03:56:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:25,491 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 03:56:25,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 03:56:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:56:25,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:25,491 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:25,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-05 03:56:25,691 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:25,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1888774482, now seen corresponding path program 222 times [2021-06-05 03:56:25,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:25,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442948068] [2021-06-05 03:56:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:25,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442948068] [2021-06-05 03:56:25,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442948068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682425172] [2021-06-05 03:56:25,772 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:25,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:56:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:25,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 03:56:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:25,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682425172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:25,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:25,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 03:56:25,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222837646] [2021-06-05 03:56:25,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 03:56:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:25,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 03:56:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:56:25,977 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:26,377 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-06-05 03:56:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 03:56:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-06-05 03:56:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:26,378 INFO L225 Difference]: With dead ends: 172 [2021-06-05 03:56:26,378 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 03:56:26,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 03:56:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 03:56:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-06-05 03:56:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-06-05 03:56:26,379 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-06-05 03:56:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:26,379 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-06-05 03:56:26,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-06-05 03:56:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:26,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:26,380 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:26,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,580 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash -26764772, now seen corresponding path program 5 times [2021-06-05 03:56:26,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:26,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883985105] [2021-06-05 03:56:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:26,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:26,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883985105] [2021-06-05 03:56:26,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883985105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232448185] [2021-06-05 03:56:26,680 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:26,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 03:56:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 03:56:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:26,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232448185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:26,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:26,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 03:56:26,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270666111] [2021-06-05 03:56:26,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:56:26,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:56:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:56:26,806 INFO L87 Difference]: Start difference. First operand 109 states and 224 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) [2021-06-05 03:56:27,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:27,078 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-06-05 03:56:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:56:27,079 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 [2021-06-05 03:56:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:27,079 INFO L225 Difference]: With dead ends: 146 [2021-06-05 03:56:27,079 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 03:56:27,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 317.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 03:56:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 03:56:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 03:56:27,081 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-05 03:56:27,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:27,081 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 03:56:27,081 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) [2021-06-05 03:56:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 03:56:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:27,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:27,081 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:27,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 03:56:27,301 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1997566364, now seen corresponding path program 223 times [2021-06-05 03:56:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944874325] [2021-06-05 03:56:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:27,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944874325] [2021-06-05 03:56:27,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944874325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:27,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426623514] [2021-06-05 03:56:27,407 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:27,429 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426623514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:28,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:28,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:28,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393951452] [2021-06-05 03:56:28,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:28,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:28,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:28,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:28,602 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:29,114 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-06-05 03:56:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:29,114 INFO L225 Difference]: With dead ends: 154 [2021-06-05 03:56:29,114 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 03:56:29,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:56:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 03:56:29,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-05 03:56:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 03:56:29,116 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-05 03:56:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:29,116 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 03:56:29,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 03:56:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:29,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:29,116 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:29,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 03:56:29,317 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1614845976, now seen corresponding path program 224 times [2021-06-05 03:56:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:29,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998081143] [2021-06-05 03:56:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:29,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998081143] [2021-06-05 03:56:29,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998081143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872450492] [2021-06-05 03:56:29,434 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:29,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:29,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:29,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:29,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872450492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:29,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:29,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:29,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602020772] [2021-06-05 03:56:29,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:29,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:29,664 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:30,097 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-06-05 03:56:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:30,097 INFO L225 Difference]: With dead ends: 159 [2021-06-05 03:56:30,098 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 03:56:30,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 03:56:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-06-05 03:56:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 03:56:30,099 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-06-05 03:56:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:30,099 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 03:56:30,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 03:56:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:30,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:30,099 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:30,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 03:56:30,300 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:30,300 INFO L82 PathProgramCache]: Analyzing trace with hash -600827492, now seen corresponding path program 225 times [2021-06-05 03:56:30,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:30,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285131116] [2021-06-05 03:56:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:30,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285131116] [2021-06-05 03:56:30,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285131116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859625453] [2021-06-05 03:56:30,406 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:30,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:56:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:30,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:30,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:30,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859625453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:30,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:30,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:30,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948293817] [2021-06-05 03:56:30,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:30,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:30,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:30,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:30,618 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:31,095 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-06-05 03:56:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:31,095 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:31,096 INFO L225 Difference]: With dead ends: 185 [2021-06-05 03:56:31,096 INFO L226 Difference]: Without dead ends: 178 [2021-06-05 03:56:31,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-06-05 03:56:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-06-05 03:56:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-05 03:56:31,097 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-06-05 03:56:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:31,097 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-05 03:56:31,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-05 03:56:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:31,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:31,098 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:31,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 03:56:31,298 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash -585366696, now seen corresponding path program 226 times [2021-06-05 03:56:31,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:31,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242961309] [2021-06-05 03:56:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:31,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242961309] [2021-06-05 03:56:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242961309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536902471] [2021-06-05 03:56:31,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:31,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:56:31,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:31,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:31,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:31,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536902471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:31,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:31,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:31,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982297469] [2021-06-05 03:56:31,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:31,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:31,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:31,784 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:32,346 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-06-05 03:56:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:32,347 INFO L225 Difference]: With dead ends: 168 [2021-06-05 03:56:32,347 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 03:56:32,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 519.3ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 03:56:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-06-05 03:56:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-06-05 03:56:32,349 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-06-05 03:56:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:32,349 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-06-05 03:56:32,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-06-05 03:56:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:32,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:32,349 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 03:56:32,565 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1736931496, now seen corresponding path program 227 times [2021-06-05 03:56:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555266069] [2021-06-05 03:56:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:32,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:32,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555266069] [2021-06-05 03:56:32,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555266069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:32,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95402019] [2021-06-05 03:56:32,669 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:32,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:56:32,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:32,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:32,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95402019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:33,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:33,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:33,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76587255] [2021-06-05 03:56:33,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:33,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:33,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:33,853 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:34,331 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-06-05 03:56:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 03:56:34,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:34,332 INFO L225 Difference]: With dead ends: 176 [2021-06-05 03:56:34,332 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 03:56:34,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 457.0ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 03:56:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 03:56:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-06-05 03:56:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-06-05 03:56:34,334 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-06-05 03:56:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:34,334 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-06-05 03:56:34,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-06-05 03:56:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:34,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:34,334 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:34,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:34,535 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1721470700, now seen corresponding path program 228 times [2021-06-05 03:56:34,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:34,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940070807] [2021-06-05 03:56:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:34,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:34,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940070807] [2021-06-05 03:56:34,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940070807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:34,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524624923] [2021-06-05 03:56:34,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:34,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:56:34,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:34,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:34,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:34,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524624923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:34,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:34,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504368899] [2021-06-05 03:56:34,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:34,866 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:35,319 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-06-05 03:56:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 03:56:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:35,320 INFO L225 Difference]: With dead ends: 177 [2021-06-05 03:56:35,320 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 03:56:35,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:56:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 03:56:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-06-05 03:56:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-06-05 03:56:35,321 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-06-05 03:56:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:35,321 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-06-05 03:56:35,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-06-05 03:56:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:35,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:35,322 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:35,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 03:56:35,522 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:35,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:35,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1150015894, now seen corresponding path program 229 times [2021-06-05 03:56:35,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:35,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559910941] [2021-06-05 03:56:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:35,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:35,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559910941] [2021-06-05 03:56:35,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559910941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:35,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142858923] [2021-06-05 03:56:35,625 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:35,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:56:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142858923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:35,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:56:35,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 03:56:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234287027] [2021-06-05 03:56:35,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 03:56:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:56:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 03:56:35,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:56:35,851 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:56:36,012 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-06-05 03:56:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:56:36,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 [2021-06-05 03:56:36,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:56:36,012 INFO L225 Difference]: With dead ends: 140 [2021-06-05 03:56:36,012 INFO L226 Difference]: Without dead ends: 133 [2021-06-05 03:56:36,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 03:56:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-06-05 03:56:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-06-05 03:56:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:56:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-06-05 03:56:36,014 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-06-05 03:56:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:56:36,014 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-06-05 03:56:36,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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) [2021-06-05 03:56:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-06-05 03:56:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:56:36,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:56:36,014 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:56:36,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 03:56:36,214 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:56:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:56:36,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1759602972, now seen corresponding path program 230 times [2021-06-05 03:56:36,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:56:36,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998513232] [2021-06-05 03:56:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:56:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:56:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:56:36,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:56:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998513232] [2021-06-05 03:56:36,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998513232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:56:36,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251938073] [2021-06-05 03:56:36,315 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:56:36,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:56:36,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:56:36,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 03:56:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 04:07:54,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:54,344 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:07:54,345 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:07:54,346 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:07:54,347 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:07:54 BasicIcfg [2021-06-05 04:07:54,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:07:54,347 INFO L168 Benchmark]: Toolchain (without parser) took 881486.35 ms. Allocated memory was 392.2 MB in the beginning and 876.6 MB in the end (delta: 484.4 MB). Free memory was 372.1 MB in the beginning and 554.8 MB in the end (delta: -182.7 MB). Peak memory consumption was 535.8 MB. Max. memory is 16.0 GB. [2021-06-05 04:07:54,347 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 392.2 MB. Free memory was 373.2 MB in the beginning and 373.1 MB in the end (delta: 70.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:07:54,347 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.73 ms. Allocated memory is still 392.2 MB. Free memory was 372.0 MB in the beginning and 370.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:07:54,348 INFO L168 Benchmark]: Boogie Preprocessor took 15.35 ms. Allocated memory is still 392.2 MB. Free memory was 370.6 MB in the beginning and 369.7 MB in the end (delta: 922.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:07:54,348 INFO L168 Benchmark]: RCFGBuilder took 224.89 ms. Allocated memory is still 392.2 MB. Free memory was 369.6 MB in the beginning and 358.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 04:07:54,348 INFO L168 Benchmark]: TraceAbstraction took 881215.13 ms. Allocated memory was 392.2 MB in the beginning and 876.6 MB in the end (delta: 484.4 MB). Free memory was 357.8 MB in the beginning and 554.8 MB in the end (delta: -197.0 MB). Peak memory consumption was 521.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:07:54,348 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 0.16 ms. Allocated memory is still 392.2 MB. Free memory was 373.2 MB in the beginning and 373.1 MB in the end (delta: 70.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.73 ms. Allocated memory is still 392.2 MB. Free memory was 372.0 MB in the beginning and 370.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.35 ms. Allocated memory is still 392.2 MB. Free memory was 370.6 MB in the beginning and 369.7 MB in the end (delta: 922.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 224.89 ms. Allocated memory is still 392.2 MB. Free memory was 369.6 MB in the beginning and 358.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 881215.13 ms. Allocated memory was 392.2 MB in the beginning and 876.6 MB in the end (delta: 484.4 MB). Free memory was 357.8 MB in the beginning and 554.8 MB in the end (delta: -197.0 MB). Peak memory consumption was 521.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 881148.5ms, OverallIterations: 241, TraceHistogramMax: 5, EmptinessCheckTime: 72.8ms, AutomataDifference: 77868.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5334 SDtfs, 15875 SDslu, 41102 SDs, 0 SdLazy, 85267 SolverSat, 2169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32739.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7860 GetRequests, 2318 SyntacticMatches, 287 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26016 ImplicationChecksByTransitivity, 85099.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=189, InterpolantAutomatonStates: 3673, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 464.9ms AutomataMinimizationTime, 240 MinimizatonAttempts, 10667 StatesRemovedByMinimization, 240 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 620.6ms SsaConstructionTime, 1761.5ms SatisfiabilityAnalysisTime, 68236.2ms InterpolantComputationTime, 8681 NumberOfCodeBlocks, 8681 NumberOfCodeBlocksAsserted, 840 NumberOfCheckSat, 8202 ConstructedInterpolants, 0 QuantifiedInterpolants, 166902 SizeOfPredicates, 1394 NumberOfNonLiveVariables, 12391 ConjunctsInSsa, 5771 ConjunctsInUnsatCore, 479 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3694 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