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/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:54,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:54,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:54,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:54,250 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:54,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:54,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:54,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:54,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:54,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:54,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:54,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:54,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:54,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:54,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:54,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:54,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:54,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:54,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:54,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:54,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:54,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:54,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:54,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:54,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:54,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:54,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:54,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:54,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:54,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:54,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:54,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:54,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:54,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:54,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:54,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:54,319 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 [2019-10-14 23:42:54,350 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:54,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:54,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:54,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:54,352 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:54,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:54,353 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:54,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:54,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:54,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:54,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:54,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:54,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:54,358 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:54,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:54,358 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:54,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:54,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:54,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:54,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:54,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:54,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:54,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:54,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:54,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:54,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:54,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:54,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:54,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:54,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:54,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:54,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:54,693 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:54,693 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:54,694 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-10-14 23:42:54,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/057310735/77943de5d40747d6945f491377445cb8/FLAG83d98cd1a [2019-10-14 23:42:55,236 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:55,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-10-14 23:42:55,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/057310735/77943de5d40747d6945f491377445cb8/FLAG83d98cd1a [2019-10-14 23:42:55,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/057310735/77943de5d40747d6945f491377445cb8 [2019-10-14 23:42:55,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:55,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:55,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:55,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:55,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:55,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f2c9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55, skipping insertion in model container [2019-10-14 23:42:55,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,641 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:55,659 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:55,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:55,867 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:55,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:55,976 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:55,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55 WrapperNode [2019-10-14 23:42:55,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:55,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:55,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:55,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:55,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:55,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:56,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:56,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:56,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (1/1) ... [2019-10-14 23:42:56,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:56,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:56,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:56,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:56,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (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 [2019-10-14 23:42:56,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:56,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:56,066 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-14 23:42:56,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-14 23:42:56,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:56,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:56,354 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:56,354 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:56,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:56 BoogieIcfgContainer [2019-10-14 23:42:56,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:56,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:56,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:56,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:56,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:55" (1/3) ... [2019-10-14 23:42:56,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77486f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:56, skipping insertion in model container [2019-10-14 23:42:56,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:55" (2/3) ... [2019-10-14 23:42:56,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77486f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:56, skipping insertion in model container [2019-10-14 23:42:56,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:56" (3/3) ... [2019-10-14 23:42:56,364 INFO L109 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2019-10-14 23:42:56,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:56,397 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:56,408 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:56,432 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:56,432 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:56,433 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:56,433 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:56,433 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:56,433 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:56,433 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:56,433 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 23:42:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:56,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,459 INFO L380 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] [2019-10-14 23:42:56,460 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-14 23:42:56,473 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631742022] [2019-10-14 23:42:56,474 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,474 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:56,665 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631742022] [2019-10-14 23:42:56,666 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:56,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:56,666 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752476983] [2019-10-14 23:42:56,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:56,671 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:56,693 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 23:42:56,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:56,815 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-14 23:42:56,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:56,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:56,826 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:56,826 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:42:56,832 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:42:56,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:42:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:42:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 23:42:56,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-14 23:42:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:56,871 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 23:42:56,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 23:42:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:56,874 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,874 INFO L380 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] [2019-10-14 23:42:56,875 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-14 23:42:56,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674808140] [2019-10-14 23:42:56,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:42:57,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674808140] [2019-10-14 23:42:57,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366632610] [2019-10-14 23:42:57,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:57,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:57,145 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:42:57,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344858837] [2019-10-14 23:42:57,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:57,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:57,148 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-14 23:42:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,162 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-14 23:42:57,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:57,162 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:42:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,164 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:42:57,164 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:42:57,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:42:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-14 23:42:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:42:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:42:57,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-14 23:42:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,173 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:42:57,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:42:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:57,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,175 INFO L380 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, 1, 1] [2019-10-14 23:42:57,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,384 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-14 23:42:57,385 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128464953] [2019-10-14 23:42:57,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:57,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128464953] [2019-10-14 23:42:57,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917779400] [2019-10-14 23:42:57,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:57,599 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:57,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:57,599 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680011801] [2019-10-14 23:42:57,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:57,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:57,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:57,601 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-14 23:42:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,623 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-14 23:42:57,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:57,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,627 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:42:57,627 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:57,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 23:42:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:57,635 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-14 23:42:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,636 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:57,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:42:57,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,638 INFO L380 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] [2019-10-14 23:42:57,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,843 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-14 23:42:57,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558830968] [2019-10-14 23:42:57,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:57,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558830968] [2019-10-14 23:42:57,981 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:57,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:57,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777794911] [2019-10-14 23:42:57,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:57,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:57,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:57,983 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-10-14 23:42:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,074 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-14 23:42:58,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:58,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-14 23:42:58,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,076 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:42:58,076 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:42:58,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:42:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:42:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:58,085 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-14 23:42:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,087 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:58,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:42:58,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,088 INFO L380 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, 1, 1] [2019-10-14 23:42:58,089 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-14 23:42:58,089 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389822007] [2019-10-14 23:42:58,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,090 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389822007] [2019-10-14 23:42:58,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232096387] [2019-10-14 23:42:58,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,278 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:58,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:58,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106415970] [2019-10-14 23:42:58,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:58,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:58,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:58,281 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-14 23:42:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,372 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-10-14 23:42:58,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:58,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-14 23:42:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,374 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:42:58,375 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:58,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-14 23:42:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:42:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-14 23:42:58,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-10-14 23:42:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,392 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-14 23:42:58,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-14 23:42:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:42:58,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,397 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:58,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,598 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-10-14 23:42:58,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395833251] [2019-10-14 23:42:58,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395833251] [2019-10-14 23:42:58,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380220481] [2019-10-14 23:42:58,693 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:58,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:58,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:58,775 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:58,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:58,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114624835] [2019-10-14 23:42:58,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:58,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:58,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:58,777 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-10-14 23:42:58,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,875 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:42:58,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:58,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 23:42:58,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,877 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:58,877 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:42:58,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:42:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-14 23:42:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:42:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-14 23:42:58,884 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-10-14 23:42:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,885 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-14 23:42:58,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-14 23:42:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:42:58,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,887 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 23:42:59,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,088 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-10-14 23:42:59,089 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128338619] [2019-10-14 23:42:59,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:59,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128338619] [2019-10-14 23:42:59,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962098454] [2019-10-14 23:42:59,217 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:42:59,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:59,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 23:42:59,335 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,336 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:59,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584489941] [2019-10-14 23:42:59,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:59,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:59,338 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-10-14 23:42:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,481 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-14 23:42:59,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:59,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-14 23:42:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,483 INFO L225 Difference]: With dead ends: 63 [2019-10-14 23:42:59,483 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:42:59,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:59,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:42:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-14 23:42:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:42:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 23:42:59,490 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-10-14 23:42:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,491 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 23:42:59,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 23:42:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:42:59,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,492 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 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] [2019-10-14 23:42:59,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,704 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,704 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-10-14 23:42:59,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114315853] [2019-10-14 23:42:59,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:42:59,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114315853] [2019-10-14 23:42:59,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152707205] [2019-10-14 23:42:59,804 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,864 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:59,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:59,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-14 23:42:59,902 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 23:42:59,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520485693] [2019-10-14 23:42:59,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:59,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:59,904 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2019-10-14 23:43:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,076 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2019-10-14 23:43:00,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:43:00,076 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2019-10-14 23:43:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,078 INFO L225 Difference]: With dead ends: 70 [2019-10-14 23:43:00,078 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:43:00,079 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:43:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:43:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-10-14 23:43:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:43:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-10-14 23:43:00,088 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 60 [2019-10-14 23:43:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,088 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-10-14 23:43:00,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:43:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-10-14 23:43:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 23:43:00,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,090 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 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] [2019-10-14 23:43:00,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,291 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,291 INFO L82 PathProgramCache]: Analyzing trace with hash -535819369, now seen corresponding path program 5 times [2019-10-14 23:43:00,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597184464] [2019-10-14 23:43:00,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-14 23:43:00,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597184464] [2019-10-14 23:43:00,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107343960] [2019-10-14 23:43:00,409 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,493 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:43:00,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:43:00,506 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:00,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-10-14 23:43:00,507 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995681358] [2019-10-14 23:43:00,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:43:00,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:43:00,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:00,510 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2019-10-14 23:43:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:00,647 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2019-10-14 23:43:00,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:43:00,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2019-10-14 23:43:00,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:00,649 INFO L225 Difference]: With dead ends: 75 [2019-10-14 23:43:00,649 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:43:00,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:43:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:43:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-10-14 23:43:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:43:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-14 23:43:00,660 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2019-10-14 23:43:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:00,661 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-14 23:43:00,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:43:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-14 23:43:00,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-14 23:43:00,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:00,664 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 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] [2019-10-14 23:43:00,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,876 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash -174901602, now seen corresponding path program 6 times [2019-10-14 23:43:00,877 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95974129] [2019-10-14 23:43:00,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2019-10-14 23:43:01,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95974129] [2019-10-14 23:43:01,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336402106] [2019-10-14 23:43:01,043 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,115 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:43:01,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:01,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-10-14 23:43:01,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-10-14 23:43:01,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104326769] [2019-10-14 23:43:01,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:43:01,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:43:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:43:01,156 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2019-10-14 23:43:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,333 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2019-10-14 23:43:01,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:43:01,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2019-10-14 23:43:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,334 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:43:01,335 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:43:01,339 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:43:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:43:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-14 23:43:01,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:43:01,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 23:43:01,346 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 80 [2019-10-14 23:43:01,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,346 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 23:43:01,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:43:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 23:43:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 23:43:01,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,350 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:01,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,557 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1544076679, now seen corresponding path program 7 times [2019-10-14 23:43:01,558 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:01,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506613568] [2019-10-14 23:43:01,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,558 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:43:01,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506613568] [2019-10-14 23:43:01,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373178513] [2019-10-14 23:43:01,705 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:01,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:01,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 180 proven. 4 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 23:43:01,826 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:43:01,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175894494] [2019-10-14 23:43:01,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:43:01,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:43:01,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:01,828 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2019-10-14 23:43:01,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,897 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2019-10-14 23:43:01,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:01,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 91 [2019-10-14 23:43:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,899 INFO L225 Difference]: With dead ends: 81 [2019-10-14 23:43:01,899 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:43:01,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:43:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 23:43:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:43:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-10-14 23:43:01,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 91 [2019-10-14 23:43:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,906 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-10-14 23:43:01,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:43:01,906 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-10-14 23:43:01,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-14 23:43:01,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,908 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 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] [2019-10-14 23:43:02,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,108 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -513954565, now seen corresponding path program 8 times [2019-10-14 23:43:02,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518942514] [2019-10-14 23:43:02,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-14 23:43:02,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518942514] [2019-10-14 23:43:02,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882517566] [2019-10-14 23:43:02,222 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:02,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:02,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:43:02,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 180 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 23:43:02,325 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:02,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 23:43:02,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834116329] [2019-10-14 23:43:02,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:43:02,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:43:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:43:02,327 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 8 states. [2019-10-14 23:43:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:02,417 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2019-10-14 23:43:02,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:43:02,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2019-10-14 23:43:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:02,420 INFO L225 Difference]: With dead ends: 82 [2019-10-14 23:43:02,420 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:43:02,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:43:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:43:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 23:43:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 23:43:02,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2019-10-14 23:43:02,429 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 93 [2019-10-14 23:43:02,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:02,429 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2019-10-14 23:43:02,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:43:02,430 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2019-10-14 23:43:02,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:43:02,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:02,431 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,632 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1590918909, now seen corresponding path program 9 times [2019-10-14 23:43:02,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164642] [2019-10-14 23:43:02,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-14 23:43:03,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164642] [2019-10-14 23:43:03,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750597641] [2019-10-14 23:43:03,485 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:03,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 23:43:03,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:03,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 23:43:03,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:03,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:03,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:03,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-14 23:43:03,987 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:03,987 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 19 [2019-10-14 23:43:03,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919329129] [2019-10-14 23:43:03,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:43:03,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:03,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:43:03,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:43:03,992 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 19 states. [2019-10-14 23:43:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:04,740 INFO L93 Difference]: Finished difference Result 151 states and 209 transitions. [2019-10-14 23:43:04,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:43:04,741 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2019-10-14 23:43:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:04,747 INFO L225 Difference]: With dead ends: 151 [2019-10-14 23:43:04,747 INFO L226 Difference]: Without dead ends: 147 [2019-10-14 23:43:04,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:43:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-14 23:43:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2019-10-14 23:43:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 23:43:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 144 transitions. [2019-10-14 23:43:04,790 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 144 transitions. Word has length 95 [2019-10-14 23:43:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:04,790 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 144 transitions. [2019-10-14 23:43:04,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:43:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 144 transitions. [2019-10-14 23:43:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:43:04,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:04,793 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2019-10-14 23:43:05,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:05,005 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2023990017, now seen corresponding path program 1 times [2019-10-14 23:43:05,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:05,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299637979] [2019-10-14 23:43:05,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 264 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 23:43:05,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299637979] [2019-10-14 23:43:05,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877587042] [2019-10-14 23:43:05,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 72 conjunts are in the unsatisfiable core [2019-10-14 23:43:06,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:06,093 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 15 treesize of output 11 [2019-10-14 23:43:06,093 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,104 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:06,105 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,105 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:3 [2019-10-14 23:43:06,357 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:06,358 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 42 treesize of output 24 [2019-10-14 23:43:06,359 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,368 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:06,368 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,368 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2019-10-14 23:43:06,510 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 [2019-10-14 23:43:06,511 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,516 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:06,516 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,516 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:11 [2019-10-14 23:43:06,527 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 [2019-10-14 23:43:06,527 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,534 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:06,536 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:06,536 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-10-14 23:43:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 7 proven. 362 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-14 23:43:07,042 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:07,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 38 [2019-10-14 23:43:07,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474055035] [2019-10-14 23:43:07,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:43:07,044 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:07,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:43:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:43:07,045 INFO L87 Difference]: Start difference. First operand 112 states and 144 transitions. Second operand 38 states. [2019-10-14 23:43:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:12,980 INFO L93 Difference]: Finished difference Result 638 states and 903 transitions. [2019-10-14 23:43:12,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-10-14 23:43:12,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 95 [2019-10-14 23:43:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:12,988 INFO L225 Difference]: With dead ends: 638 [2019-10-14 23:43:12,988 INFO L226 Difference]: Without dead ends: 575 [2019-10-14 23:43:12,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=675, Invalid=8445, Unknown=0, NotChecked=0, Total=9120 [2019-10-14 23:43:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2019-10-14 23:43:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 310. [2019-10-14 23:43:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2019-10-14 23:43:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 417 transitions. [2019-10-14 23:43:13,062 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 417 transitions. Word has length 95 [2019-10-14 23:43:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:13,064 INFO L462 AbstractCegarLoop]: Abstraction has 310 states and 417 transitions. [2019-10-14 23:43:13,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:43:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 417 transitions. [2019-10-14 23:43:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:43:13,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:13,067 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2019-10-14 23:43:13,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:13,270 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:13,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1849084347, now seen corresponding path program 2 times [2019-10-14 23:43:13,271 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:13,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520991483] [2019-10-14 23:43:13,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:13,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-14 23:43:14,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520991483] [2019-10-14 23:43:14,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881040860] [2019-10-14 23:43:14,719 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:14,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:14,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:14,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 69 conjunts are in the unsatisfiable core [2019-10-14 23:43:14,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:14,834 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,836 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 [2019-10-14 23:43:14,837 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:14,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:14,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:14,843 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-10-14 23:43:14,984 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 76 treesize of output 63 [2019-10-14 23:43:14,987 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,988 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,989 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,992 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,996 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,998 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:14,999 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,001 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2019-10-14 23:43:15,002 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,008 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,008 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,018 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,019 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,019 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:82, output treesize:46 [2019-10-14 23:43:15,139 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,140 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:43:15,141 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,142 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,144 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,145 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,146 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,147 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,147 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 59 [2019-10-14 23:43:15,148 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,168 INFO L567 ElimStorePlain]: treesize reduction 18, result has 71.9 percent of original size [2019-10-14 23:43:15,169 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,169 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:46 [2019-10-14 23:43:15,292 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,294 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:43:15,296 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,297 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,298 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,298 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,299 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,301 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,302 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 61 [2019-10-14 23:43:15,302 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,319 INFO L567 ElimStorePlain]: treesize reduction 17, result has 72.1 percent of original size [2019-10-14 23:43:15,320 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,320 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:44 [2019-10-14 23:43:15,438 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,439 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,440 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,442 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,442 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 38 [2019-10-14 23:43:15,443 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,451 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,452 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:38 [2019-10-14 23:43:15,515 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:15,517 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,517 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 48 treesize of output 29 [2019-10-14 23:43:15,518 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,526 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:15,526 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:15,526 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:23 [2019-10-14 23:43:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 190 proven. 188 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 23:43:16,129 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 42 [2019-10-14 23:43:16,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848941702] [2019-10-14 23:43:16,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 23:43:16,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 23:43:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:43:16,133 INFO L87 Difference]: Start difference. First operand 310 states and 417 transitions. Second operand 42 states. [2019-10-14 23:43:21,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:21,648 INFO L93 Difference]: Finished difference Result 1439 states and 2060 transitions. [2019-10-14 23:43:21,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-14 23:43:21,651 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 95 [2019-10-14 23:43:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:21,659 INFO L225 Difference]: With dead ends: 1439 [2019-10-14 23:43:21,660 INFO L226 Difference]: Without dead ends: 1041 [2019-10-14 23:43:21,666 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=524, Invalid=6448, Unknown=0, NotChecked=0, Total=6972 [2019-10-14 23:43:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2019-10-14 23:43:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 677. [2019-10-14 23:43:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2019-10-14 23:43:21,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 932 transitions. [2019-10-14 23:43:21,740 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 932 transitions. Word has length 95 [2019-10-14 23:43:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:21,740 INFO L462 AbstractCegarLoop]: Abstraction has 677 states and 932 transitions. [2019-10-14 23:43:21,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 23:43:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 932 transitions. [2019-10-14 23:43:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:43:21,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:21,744 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2019-10-14 23:43:21,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:21,949 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash 311055231, now seen corresponding path program 3 times [2019-10-14 23:43:21,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:21,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479419795] [2019-10-14 23:43:21,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:21,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 91 proven. 279 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-14 23:43:23,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479419795] [2019-10-14 23:43:23,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885397838] [2019-10-14 23:43:23,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:23,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-14 23:43:23,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:23,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-14 23:43:23,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:23,344 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,345 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 [2019-10-14 23:43:23,345 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:23,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:23,352 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:23,352 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-10-14 23:43:23,645 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 62 treesize of output 49 [2019-10-14 23:43:23,647 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,649 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,650 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,652 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,653 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,654 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,657 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,660 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,661 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,662 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,663 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2019-10-14 23:43:23,664 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:23,675 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:23,675 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:23,683 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:23,683 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:43:23,683 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:68, output treesize:46 [2019-10-14 23:43:23,803 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,804 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,806 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,807 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,810 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,812 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:43:23,853 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:43:23,853 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 64 treesize of output 176 [2019-10-14 23:43:23,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:23,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:23,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:23,857 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:43:23,963 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2019-10-14 23:43:23,964 INFO L567 ElimStorePlain]: treesize reduction 247, result has 25.4 percent of original size [2019-10-14 23:43:23,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:23,965 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 23:43:23,966 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:84 [2019-10-14 23:43:23,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:43:34,048 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 40 [2019-10-14 23:43:34,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms