java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:59:12,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:59:12,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:59:12,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:59:12,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:59:12,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:59:12,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:59:12,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:59:12,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:59:12,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:59:12,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:59:12,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:59:12,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:59:12,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:59:12,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:59:12,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:59:12,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:59:12,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:59:12,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:59:12,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:59:12,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:59:12,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:59:12,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:59:12,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:59:12,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:59:12,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:59:12,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:59:12,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:59:12,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:59:12,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:59:12,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:59:12,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:59:12,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:59:12,385 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:59:12,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:59:12,386 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:59:12,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:59:12,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:59:12,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:59:12,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:59:12,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:59:12,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:59:12,388 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:59:12,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:59:12,389 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:59:12,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:59:12,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:59:12,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:59:12,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:59:12,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:59:12,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:59:12,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:59:12,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:59:12,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:59:12,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:59:12,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:59:12,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:59:12,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:59:12,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:59:12,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:59:12,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:59:12,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:59:12,460 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:59:12,461 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep.i [2019-09-20 12:59:12,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678b22840/e1176f1271e64a768d5752fa0bfcb635/FLAG32ee0ce84 [2019-09-20 12:59:12,958 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:59:12,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep.i [2019-09-20 12:59:12,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678b22840/e1176f1271e64a768d5752fa0bfcb635/FLAG32ee0ce84 [2019-09-20 12:59:13,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678b22840/e1176f1271e64a768d5752fa0bfcb635 [2019-09-20 12:59:13,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:59:13,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:59:13,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:13,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:59:13,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:59:13,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e611eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13, skipping insertion in model container [2019-09-20 12:59:13,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,371 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:59:13,398 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:59:13,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:13,639 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:59:13,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:59:13,678 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:59:13,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13 WrapperNode [2019-09-20 12:59:13,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:59:13,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:59:13,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:59:13,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:59:13,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (1/1) ... [2019-09-20 12:59:13,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:59:13,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:59:13,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:59:13,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:59:13,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (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 [2019-09-20 12:59:13,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:59:13,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:59:13,873 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-09-20 12:59:13,873 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:59:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:59:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 12:59:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-09-20 12:59:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:59:13,873 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:59:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:59:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:59:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:59:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:59:13,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:59:14,190 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:59:14,191 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 12:59:14,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:14 BoogieIcfgContainer [2019-09-20 12:59:14,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:59:14,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:59:14,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:59:14,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:59:14,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:59:13" (1/3) ... [2019-09-20 12:59:14,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a62bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:14, skipping insertion in model container [2019-09-20 12:59:14,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:59:13" (2/3) ... [2019-09-20 12:59:14,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50a62bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:59:14, skipping insertion in model container [2019-09-20 12:59:14,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:59:14" (3/3) ... [2019-09-20 12:59:14,199 INFO L109 eAbstractionObserver]: Analyzing ICFG sep.i [2019-09-20 12:59:14,208 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:59:14,215 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:59:14,231 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:59:14,259 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:59:14,259 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:59:14,259 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:59:14,260 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:59:14,260 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:59:14,260 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:59:14,260 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:59:14,260 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:59:14,260 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:59:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-20 12:59:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 12:59:14,283 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,284 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,286 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1691531413, now seen corresponding path program 1 times [2019-09-20 12:59:14,292 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-20 12:59:14,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:14,572 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:14,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:14,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 12:59:14,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:14,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 12:59:14,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-09-20 12:59:14,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:59:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:59:14,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:59:14,734 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 6 states. [2019-09-20 12:59:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:14,874 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2019-09-20 12:59:14,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:59:14,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-09-20 12:59:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:14,885 INFO L225 Difference]: With dead ends: 64 [2019-09-20 12:59:14,885 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:14,889 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:59:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-09-20 12:59:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:59:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-20 12:59:14,931 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-20 12:59:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:14,932 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-20 12:59:14,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:59:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-20 12:59:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-20 12:59:14,934 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:14,935 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:14,935 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2111009974, now seen corresponding path program 1 times [2019-09-20 12:59:14,936 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:14,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:14,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:14,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-09-20 12:59:15,050 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:59:15,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 12:59:15,051 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:59:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:59:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:15,052 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-20 12:59:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,099 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-09-20 12:59:15,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 12:59:15,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-09-20 12:59:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,102 INFO L225 Difference]: With dead ends: 43 [2019-09-20 12:59:15,102 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:59:15,103 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:59:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:59:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-20 12:59:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 12:59:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-20 12:59:15,110 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 41 [2019-09-20 12:59:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,112 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-20 12:59:15,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:59:15,113 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-20 12:59:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-20 12:59:15,114 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,115 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,115 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1738733132, now seen corresponding path program 1 times [2019-09-20 12:59:15,116 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:15,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-20 12:59:15,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,274 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:15,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:59:15,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:15,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:15,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-09-20 12:59:15,419 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:59:15,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:59:15,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:59:15,421 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2019-09-20 12:59:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:15,525 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2019-09-20 12:59:15,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:59:15,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2019-09-20 12:59:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:15,528 INFO L225 Difference]: With dead ends: 53 [2019-09-20 12:59:15,528 INFO L226 Difference]: Without dead ends: 33 [2019-09-20 12:59:15,528 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:59:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-20 12:59:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-09-20 12:59:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 12:59:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-09-20 12:59:15,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 43 [2019-09-20 12:59:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:15,539 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-09-20 12:59:15,540 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:59:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-09-20 12:59:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:15,542 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:15,543 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:15,543 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1671851891, now seen corresponding path program 2 times [2019-09-20 12:59:15,543 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:15,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:15,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:15,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-20 12:59:15,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:15,981 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:16,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:16,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:16,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:16,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-20 12:59:16,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:16,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:16,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:16,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:16,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:16,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-09-20 12:59:16,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 12:59:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 12:59:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-20 12:59:16,247 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 14 states. [2019-09-20 12:59:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:16,506 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2019-09-20 12:59:16,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-20 12:59:16,508 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2019-09-20 12:59:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:16,514 INFO L225 Difference]: With dead ends: 77 [2019-09-20 12:59:16,515 INFO L226 Difference]: Without dead ends: 73 [2019-09-20 12:59:16,518 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-20 12:59:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-20 12:59:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2019-09-20 12:59:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-20 12:59:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2019-09-20 12:59:16,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 52 [2019-09-20 12:59:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:16,554 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2019-09-20 12:59:16,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 12:59:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2019-09-20 12:59:16,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:16,559 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:16,560 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:16,560 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1943057035, now seen corresponding path program 1 times [2019-09-20 12:59:16,561 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:16,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:16,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:16,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-20 12:59:17,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:17,260 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:17,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:17,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-20 12:59:17,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:17,537 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:17,542 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-09-20 12:59:17,543 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:17,550 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:17,551 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:17,551 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:9 [2019-09-20 12:59:17,684 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-09-20 12:59:17,685 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:17,702 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:17,702 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:17,703 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:16 [2019-09-20 12:59:17,711 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-09-20 12:59:17,711 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:17,719 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:17,719 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:17,720 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-09-20 12:59:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 12:59:18,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:18,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 29 [2019-09-20 12:59:18,009 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-20 12:59:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-20 12:59:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2019-09-20 12:59:18,010 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand 29 states. [2019-09-20 12:59:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:22,387 INFO L93 Difference]: Finished difference Result 326 states and 471 transitions. [2019-09-20 12:59:22,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-20 12:59:22,392 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2019-09-20 12:59:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:22,397 INFO L225 Difference]: With dead ends: 326 [2019-09-20 12:59:22,397 INFO L226 Difference]: Without dead ends: 265 [2019-09-20 12:59:22,402 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=977, Invalid=5343, Unknown=0, NotChecked=0, Total=6320 [2019-09-20 12:59:22,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-09-20 12:59:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 204. [2019-09-20 12:59:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-09-20 12:59:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 303 transitions. [2019-09-20 12:59:22,454 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 303 transitions. Word has length 52 [2019-09-20 12:59:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:22,455 INFO L475 AbstractCegarLoop]: Abstraction has 204 states and 303 transitions. [2019-09-20 12:59:22,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-20 12:59:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 303 transitions. [2019-09-20 12:59:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:22,459 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:22,459 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:22,460 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1733891505, now seen corresponding path program 2 times [2019-09-20 12:59:22,460 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:22,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:22,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:22,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:22,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-20 12:59:23,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:23,327 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:23,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:59:23,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:59:23,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:23,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-20 12:59:23,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:23,522 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:23,525 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:23,525 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2019-09-20 12:59:23,526 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:23,530 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:23,531 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:23,531 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:15 [2019-09-20 12:59:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 12:59:23,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:23,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-09-20 12:59:23,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-20 12:59:23,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-20 12:59:23,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2019-09-20 12:59:23,811 INFO L87 Difference]: Start difference. First operand 204 states and 303 transitions. Second operand 28 states. [2019-09-20 12:59:26,640 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2019-09-20 12:59:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:26,876 INFO L93 Difference]: Finished difference Result 695 states and 1005 transitions. [2019-09-20 12:59:26,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-20 12:59:26,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2019-09-20 12:59:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:26,884 INFO L225 Difference]: With dead ends: 695 [2019-09-20 12:59:26,884 INFO L226 Difference]: Without dead ends: 466 [2019-09-20 12:59:26,891 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=473, Invalid=3559, Unknown=0, NotChecked=0, Total=4032 [2019-09-20 12:59:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2019-09-20 12:59:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 348. [2019-09-20 12:59:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2019-09-20 12:59:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 496 transitions. [2019-09-20 12:59:26,970 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 496 transitions. Word has length 52 [2019-09-20 12:59:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:26,970 INFO L475 AbstractCegarLoop]: Abstraction has 348 states and 496 transitions. [2019-09-20 12:59:26,970 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-20 12:59:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 496 transitions. [2019-09-20 12:59:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:26,973 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:26,973 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:26,973 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash -173515275, now seen corresponding path program 3 times [2019-09-20 12:59:26,974 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:26,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:26,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:26,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:26,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-20 12:59:27,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:27,773 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:59:27,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:27,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-20 12:59:27,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:27,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-20 12:59:27,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:28,032 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,040 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2019-09-20 12:59:28,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,049 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:28,052 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2019-09-20 12:59:28,053 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,078 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:28,079 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-09-20 12:59:28,080 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:35 [2019-09-20 12:59:28,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,223 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2019-09-20 12:59:28,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,228 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2019-09-20 12:59:28,228 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,241 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:28,242 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-09-20 12:59:28,242 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:27 [2019-09-20 12:59:28,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,298 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2019-09-20 12:59:28,298 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,306 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2019-09-20 12:59:28,307 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:28,327 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:28,328 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-09-20 12:59:28,328 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:45 [2019-09-20 12:59:28,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 12:59:28,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:28,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2019-09-20 12:59:28,951 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-20 12:59:28,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-20 12:59:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2019-09-20 12:59:28,953 INFO L87 Difference]: Start difference. First operand 348 states and 496 transitions. Second operand 35 states. [2019-09-20 12:59:31,809 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2019-09-20 12:59:32,292 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2019-09-20 12:59:32,445 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2019-09-20 12:59:32,659 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2019-09-20 12:59:32,834 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2019-09-20 12:59:33,182 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2019-09-20 12:59:33,492 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2019-09-20 12:59:33,626 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-09-20 12:59:33,917 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2019-09-20 12:59:34,101 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2019-09-20 12:59:35,033 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2019-09-20 12:59:36,110 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2019-09-20 12:59:36,575 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2019-09-20 12:59:37,060 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2019-09-20 12:59:38,217 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 38 [2019-09-20 12:59:38,655 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2019-09-20 12:59:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:38,831 INFO L93 Difference]: Finished difference Result 1123 states and 1540 transitions. [2019-09-20 12:59:38,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-20 12:59:38,832 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 52 [2019-09-20 12:59:38,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:38,843 INFO L225 Difference]: With dead ends: 1123 [2019-09-20 12:59:38,843 INFO L226 Difference]: Without dead ends: 967 [2019-09-20 12:59:38,848 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4078 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1366, Invalid=10844, Unknown=0, NotChecked=0, Total=12210 [2019-09-20 12:59:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2019-09-20 12:59:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 698. [2019-09-20 12:59:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 698 states. [2019-09-20 12:59:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 966 transitions. [2019-09-20 12:59:38,925 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 966 transitions. Word has length 52 [2019-09-20 12:59:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:38,925 INFO L475 AbstractCegarLoop]: Abstraction has 698 states and 966 transitions. [2019-09-20 12:59:38,926 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-20 12:59:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 966 transitions. [2019-09-20 12:59:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:38,928 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:38,928 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:38,929 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1892746489, now seen corresponding path program 4 times [2019-09-20 12:59:38,929 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:38,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:38,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:38,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:38,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-20 12:59:39,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:39,109 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:39,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:59:39,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:59:39,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:39,194 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-20 12:59:39,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:39,270 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:39,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:39,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2019-09-20 12:59:39,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 12:59:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 12:59:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-09-20 12:59:39,280 INFO L87 Difference]: Start difference. First operand 698 states and 966 transitions. Second operand 15 states. [2019-09-20 12:59:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:39,571 INFO L93 Difference]: Finished difference Result 1156 states and 1751 transitions. [2019-09-20 12:59:39,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-20 12:59:39,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-09-20 12:59:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:39,590 INFO L225 Difference]: With dead ends: 1156 [2019-09-20 12:59:39,590 INFO L226 Difference]: Without dead ends: 1152 [2019-09-20 12:59:39,592 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:59:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2019-09-20 12:59:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 890. [2019-09-20 12:59:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-09-20 12:59:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1298 transitions. [2019-09-20 12:59:39,739 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1298 transitions. Word has length 52 [2019-09-20 12:59:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:39,739 INFO L475 AbstractCegarLoop]: Abstraction has 890 states and 1298 transitions. [2019-09-20 12:59:39,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 12:59:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1298 transitions. [2019-09-20 12:59:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:39,745 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:39,745 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:39,745 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:39,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2144055369, now seen corresponding path program 5 times [2019-09-20 12:59:39,746 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:39,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:39,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:39,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:39,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 12:59:40,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:40,678 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:40,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-20 12:59:40,777 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-20 12:59:40,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:40,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-20 12:59:40,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:40,964 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:40,965 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2019-09-20 12:59:40,966 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:40,974 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:40,974 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:40,975 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2019-09-20 12:59:41,161 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,163 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2019-09-20 12:59:41,164 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,171 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,171 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,171 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2019-09-20 12:59:41,213 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:41,215 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,215 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2019-09-20 12:59:41,215 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:41,224 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:41,224 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2019-09-20 12:59:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:59:41,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:41,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 37 [2019-09-20 12:59:41,504 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-20 12:59:41,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-20 12:59:41,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2019-09-20 12:59:41,505 INFO L87 Difference]: Start difference. First operand 890 states and 1298 transitions. Second operand 37 states. [2019-09-20 12:59:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:46,512 INFO L93 Difference]: Finished difference Result 1137 states and 1606 transitions. [2019-09-20 12:59:46,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-20 12:59:46,512 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 52 [2019-09-20 12:59:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:46,519 INFO L225 Difference]: With dead ends: 1137 [2019-09-20 12:59:46,519 INFO L226 Difference]: Without dead ends: 1119 [2019-09-20 12:59:46,522 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=898, Invalid=6584, Unknown=0, NotChecked=0, Total=7482 [2019-09-20 12:59:46,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2019-09-20 12:59:46,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 874. [2019-09-20 12:59:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2019-09-20 12:59:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1256 transitions. [2019-09-20 12:59:46,626 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1256 transitions. Word has length 52 [2019-09-20 12:59:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:46,626 INFO L475 AbstractCegarLoop]: Abstraction has 874 states and 1256 transitions. [2019-09-20 12:59:46,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-20 12:59:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1256 transitions. [2019-09-20 12:59:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:46,633 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:46,633 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:46,633 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1919998385, now seen corresponding path program 6 times [2019-09-20 12:59:46,634 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:46,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:46,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:46,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:46,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-20 12:59:47,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:47,237 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:47,282 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-20 12:59:47,334 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-09-20 12:59:47,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:47,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-20 12:59:47,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:47,507 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:47,509 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:47,510 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 23 [2019-09-20 12:59:47,510 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:47,516 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:47,517 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:47,517 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:19 [2019-09-20 12:59:47,666 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:47,667 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2019-09-20 12:59:47,667 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:47,674 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:47,675 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:47,675 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:30 [2019-09-20 12:59:47,714 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:47,716 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 12:59:47,729 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 12:59:47,730 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 70 [2019-09-20 12:59:47,731 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 12:59:47,762 INFO L567 ElimStorePlain]: treesize reduction 21, result has 71.6 percent of original size [2019-09-20 12:59:47,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:47,764 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 12:59:47,764 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2019-09-20 12:59:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-20 12:59:47,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:47,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2019-09-20 12:59:47,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-20 12:59:47,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-20 12:59:47,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2019-09-20 12:59:47,958 INFO L87 Difference]: Start difference. First operand 874 states and 1256 transitions. Second operand 28 states. [2019-09-20 12:59:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:50,695 INFO L93 Difference]: Finished difference Result 1758 states and 2488 transitions. [2019-09-20 12:59:50,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-20 12:59:50,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2019-09-20 12:59:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:50,705 INFO L225 Difference]: With dead ends: 1758 [2019-09-20 12:59:50,705 INFO L226 Difference]: Without dead ends: 1270 [2019-09-20 12:59:50,713 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=440, Invalid=3100, Unknown=0, NotChecked=0, Total=3540 [2019-09-20 12:59:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2019-09-20 12:59:50,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1015. [2019-09-20 12:59:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2019-09-20 12:59:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1417 transitions. [2019-09-20 12:59:50,835 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1417 transitions. Word has length 52 [2019-09-20 12:59:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:50,836 INFO L475 AbstractCegarLoop]: Abstraction has 1015 states and 1417 transitions. [2019-09-20 12:59:50,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-20 12:59:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1417 transitions. [2019-09-20 12:59:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-20 12:59:50,839 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:50,839 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:50,839 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1833869261, now seen corresponding path program 1 times [2019-09-20 12:59:50,840 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:50,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:50,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:50,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:59:50,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-20 12:59:51,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:51,126 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:51,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:51,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-20 12:59:51,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:51,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:51,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:51,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:59:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-20 12:59:51,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:51,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-09-20 12:59:51,359 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 12:59:51,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 12:59:51,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-20 12:59:51,360 INFO L87 Difference]: Start difference. First operand 1015 states and 1417 transitions. Second operand 14 states. [2019-09-20 12:59:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:59:51,673 INFO L93 Difference]: Finished difference Result 1566 states and 2355 transitions. [2019-09-20 12:59:51,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-20 12:59:51,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2019-09-20 12:59:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:59:51,685 INFO L225 Difference]: With dead ends: 1566 [2019-09-20 12:59:51,685 INFO L226 Difference]: Without dead ends: 1562 [2019-09-20 12:59:51,687 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-09-20 12:59:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2019-09-20 12:59:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1202. [2019-09-20 12:59:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1202 states. [2019-09-20 12:59:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1734 transitions. [2019-09-20 12:59:51,859 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1734 transitions. Word has length 52 [2019-09-20 12:59:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:59:51,861 INFO L475 AbstractCegarLoop]: Abstraction has 1202 states and 1734 transitions. [2019-09-20 12:59:51,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-20 12:59:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1734 transitions. [2019-09-20 12:59:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-20 12:59:51,868 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:59:51,868 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:59:51,868 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:59:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:59:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash -359515934, now seen corresponding path program 3 times [2019-09-20 12:59:51,869 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:59:51,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:59:51,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:51,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:59:51,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:59:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:59:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 56 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-20 12:59:51,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:59:51,947 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:59:52,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:59:52,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-20 12:59:52,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:59:52,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 12:59:52,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:59:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-20 12:59:52,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:59:52,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-20 12:59:52,118 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-20 12:59:52,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-20 12:59:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-20 12:59:52,120 INFO L87 Difference]: Start difference. First operand 1202 states and 1734 transitions. Second operand 14 states.