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/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:43:54,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:43:54,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:43:54,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:43:54,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:43:54,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:43:54,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:43:54,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:43:54,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:43:54,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:43:54,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:43:54,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:43:54,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:43:54,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:43:54,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:43:54,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:43:54,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:43:54,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:43:54,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:43:54,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:43:54,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:43:54,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:43:54,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:43:54,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:43:54,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:43:54,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:43:54,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:43:54,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:43:54,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:43:54,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:43:54,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:43:54,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:43:54,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:43:54,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:43:54,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:43:54,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:43:54,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:43:54,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:43:54,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:43:54,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:43:54,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:43:54,344 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 [2019-10-13 19:43:54,361 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:43:54,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:43:54,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:43:54,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:43:54,362 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:43:54,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:43:54,363 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:43:54,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:43:54,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:43:54,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:43:54,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:43:54,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:43:54,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:43:54,364 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:43:54,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:43:54,365 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:43:54,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:43:54,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:43:54,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:43:54,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:43:54,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:43:54,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:43:54,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:43:54,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:43:54,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:43:54,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:43:54,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:43:54,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:43:54,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:43:54,666 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:43:54,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:43:54,693 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:43:54,694 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:43:54,695 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:43:54,696 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-10-13 19:43:54,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb26038b/b9fd1d37ddc24abca38a843cfedd67a1/FLAG944475a31 [2019-10-13 19:43:55,243 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:43:55,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-10-13 19:43:55,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb26038b/b9fd1d37ddc24abca38a843cfedd67a1/FLAG944475a31 [2019-10-13 19:43:55,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cb26038b/b9fd1d37ddc24abca38a843cfedd67a1 [2019-10-13 19:43:55,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:43:55,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:43:55,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:43:55,647 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:43:55,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:43:55,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:55" (1/1) ... [2019-10-13 19:43:55,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ea140a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:55, skipping insertion in model container [2019-10-13 19:43:55,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:43:55" (1/1) ... [2019-10-13 19:43:55,668 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:43:55,686 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:43:55,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:43:55,964 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:43:56,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:43:56,110 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:43:56,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56 WrapperNode [2019-10-13 19:43:56,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:43:56,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:43:56,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:43:56,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:43:56,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (1/1) ... [2019-10-13 19:43:56,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:43:56,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:43:56,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:43:56,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:43:56,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (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 [2019-10-13 19:43:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:43:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:43:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-13 19:43:56,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:43:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:43:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:43:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:43:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:43:56,572 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:43:56,573 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 19:43:56,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:56 BoogieIcfgContainer [2019-10-13 19:43:56,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:43:56,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:43:56,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:43:56,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:43:56,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:43:55" (1/3) ... [2019-10-13 19:43:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dd4d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:56, skipping insertion in model container [2019-10-13 19:43:56,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:43:56" (2/3) ... [2019-10-13 19:43:56,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dd4d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:43:56, skipping insertion in model container [2019-10-13 19:43:56,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:43:56" (3/3) ... [2019-10-13 19:43:56,590 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-10-13 19:43:56,597 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:43:56,606 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:43:56,617 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:43:56,641 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:43:56,642 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:43:56,642 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:43:56,642 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:43:56,642 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:43:56,642 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:43:56,642 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:43:56,643 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:43:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-13 19:43:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:43:56,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:56,666 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] [2019-10-13 19:43:56,668 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:56,673 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-13 19:43:56,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:56,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290243635] [2019-10-13 19:43:56,680 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:56,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:56,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:43:56,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290243635] [2019-10-13 19:43:56,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:56,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:43:56,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644688062] [2019-10-13 19:43:56,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:56,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:43:56,915 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-13 19:43:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:57,037 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-13 19:43:57,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:57,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 19:43:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:57,050 INFO L225 Difference]: With dead ends: 56 [2019-10-13 19:43:57,050 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:43:57,054 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 [2019-10-13 19:43:57,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:43:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 19:43:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:43:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 19:43:57,098 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-13 19:43:57,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:57,098 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 19:43:57,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 19:43:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:43:57,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:57,101 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] [2019-10-13 19:43:57,102 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-13 19:43:57,103 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:57,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190076390] [2019-10-13 19:43:57,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:57,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:57,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 19:43:57,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190076390] [2019-10-13 19:43:57,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422813652] [2019-10-13 19:43:57,274 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 [2019-10-13 19:43:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:43:57,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 19:43:57,406 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:43:57,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 19:43:57,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274384088] [2019-10-13 19:43:57,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:57,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:57,410 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-13 19:43:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:57,425 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-13 19:43:57,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:57,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 19:43:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:57,427 INFO L225 Difference]: With dead ends: 48 [2019-10-13 19:43:57,427 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:43:57,428 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 [2019-10-13 19:43:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:43:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 19:43:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:43:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-13 19:43:57,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-13 19:43:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:57,438 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-13 19:43:57,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-13 19:43:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:43:57,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:57,441 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] [2019-10-13 19:43:57,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:57,645 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-13 19:43:57,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:57,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780912931] [2019-10-13 19:43:57,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:57,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:57,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 19:43:57,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780912931] [2019-10-13 19:43:57,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897113908] [2019-10-13 19:43:57,789 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 [2019-10-13 19:43:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:57,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 19:43:57,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 19:43:57,860 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:43:57,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-13 19:43:57,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109020126] [2019-10-13 19:43:57,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:43:57,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:57,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:43:57,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:57,862 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-13 19:43:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:57,910 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-13 19:43:57,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:43:57,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-13 19:43:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:57,912 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:43:57,912 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:43:57,913 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 [2019-10-13 19:43:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:43:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-13 19:43:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:43:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-13 19:43:57,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-13 19:43:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:57,921 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-13 19:43:57,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:43:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-13 19:43:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:43:57,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:57,924 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] [2019-10-13 19:43:58,126 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:58,127 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:58,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-13 19:43:58,129 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:58,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858762387] [2019-10-13 19:43:58,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:58,130 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:58,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:43:58,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858762387] [2019-10-13 19:43:58,318 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:43:58,319 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:43:58,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056936350] [2019-10-13 19:43:58,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:43:58,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:43:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:43:58,322 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2019-10-13 19:43:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:58,411 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-13 19:43:58,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:43:58,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-13 19:43:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:58,414 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:43:58,414 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:43:58,415 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 [2019-10-13 19:43:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:43:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-13 19:43:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:43:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-13 19:43:58,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-13 19:43:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:58,429 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-13 19:43:58,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:43:58,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-13 19:43:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:43:58,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:58,433 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] [2019-10-13 19:43:58,433 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-13 19:43:58,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:58,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90216423] [2019-10-13 19:43:58,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:58,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:58,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:43:58,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90216423] [2019-10-13 19:43:58,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138229217] [2019-10-13 19:43:58,554 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 [2019-10-13 19:43:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:58,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:43:58,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:43:58,631 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:58,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 19:43:58,631 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623676916] [2019-10-13 19:43:58,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:43:58,632 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:43:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:43:58,633 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-13 19:43:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:58,729 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-10-13 19:43:58,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:43:58,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-10-13 19:43:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:58,733 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:43:58,733 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:43:58,733 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 [2019-10-13 19:43:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:43:58,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-13 19:43:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 19:43:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-10-13 19:43:58,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 45 [2019-10-13 19:43:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:58,740 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-10-13 19:43:58,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:43:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-10-13 19:43:58,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:43:58,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:58,742 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] [2019-10-13 19:43:58,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:58,944 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:58,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:58,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1356401117, now seen corresponding path program 2 times [2019-10-13 19:43:58,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:58,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958307627] [2019-10-13 19:43:58,945 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:58,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:58,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:43:59,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958307627] [2019-10-13 19:43:59,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550840512] [2019-10-13 19:43:59,068 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 [2019-10-13 19:43:59,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:43:59,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:59,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:43:59,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:43:59,151 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:59,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 19:43:59,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493312496] [2019-10-13 19:43:59,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:43:59,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:59,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:43:59,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:43:59,153 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2019-10-13 19:43:59,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:59,285 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-13 19:43:59,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:43:59,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-13 19:43:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:59,287 INFO L225 Difference]: With dead ends: 56 [2019-10-13 19:43:59,287 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:43:59,290 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 [2019-10-13 19:43:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:43:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 19:43:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:43:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-13 19:43:59,304 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 47 [2019-10-13 19:43:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:59,307 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-13 19:43:59,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:43:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-13 19:43:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:43:59,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:59,309 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] [2019-10-13 19:43:59,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:43:59,511 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:43:59,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:43:59,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1005160965, now seen corresponding path program 3 times [2019-10-13 19:43:59,511 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:43:59,511 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404342149] [2019-10-13 19:43:59,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:59,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:43:59,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:43:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:43:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 19:43:59,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404342149] [2019-10-13 19:43:59,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356847574] [2019-10-13 19:43:59,621 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 [2019-10-13 19:43:59,689 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 19:43:59,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:43:59,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:43:59,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:43:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 19:43:59,718 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:43:59,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 19:43:59,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456407701] [2019-10-13 19:43:59,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:43:59,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:43:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:43:59,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:43:59,720 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2019-10-13 19:43:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:43:59,879 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2019-10-13 19:43:59,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:43:59,879 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2019-10-13 19:43:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:43:59,880 INFO L225 Difference]: With dead ends: 63 [2019-10-13 19:43:59,881 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:43:59,881 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 [2019-10-13 19:43:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:43:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-10-13 19:43:59,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:43:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-13 19:43:59,893 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 49 [2019-10-13 19:43:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:43:59,896 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-13 19:43:59,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:43:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-13 19:43:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 19:43:59,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:43:59,899 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] [2019-10-13 19:44:00,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:00,103 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:00,104 INFO L82 PathProgramCache]: Analyzing trace with hash 742022364, now seen corresponding path program 4 times [2019-10-13 19:44:00,106 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:00,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210965735] [2019-10-13 19:44:00,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:00,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:00,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 19:44:00,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210965735] [2019-10-13 19:44:00,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117766736] [2019-10-13 19:44:00,240 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 [2019-10-13 19:44:00,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:44:00,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:00,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:44:00,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 19:44:00,359 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:00,359 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 19:44:00,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529303192] [2019-10-13 19:44:00,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:44:00,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:44:00,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:44:00,365 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2019-10-13 19:44:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:00,566 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2019-10-13 19:44:00,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:44:00,567 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2019-10-13 19:44:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:00,568 INFO L225 Difference]: With dead ends: 71 [2019-10-13 19:44:00,568 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:44:00,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:44:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:44:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-13 19:44:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:44:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-10-13 19:44:00,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 60 [2019-10-13 19:44:00,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:00,576 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-10-13 19:44:00,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:44:00,576 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-10-13 19:44:00,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 19:44:00,577 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:00,577 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] [2019-10-13 19:44:00,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:00,785 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -535819369, now seen corresponding path program 5 times [2019-10-13 19:44:00,787 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:00,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607096038] [2019-10-13 19:44:00,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:00,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:00,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-13 19:44:00,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607096038] [2019-10-13 19:44:00,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899419880] [2019-10-13 19:44:00,922 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 [2019-10-13 19:44:01,022 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 19:44:01,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:01,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:44:01,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 19:44:01,110 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:01,110 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-13 19:44:01,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638164233] [2019-10-13 19:44:01,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:44:01,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:44:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:44:01,113 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2019-10-13 19:44:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:01,321 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2019-10-13 19:44:01,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:44:01,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-10-13 19:44:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:01,322 INFO L225 Difference]: With dead ends: 79 [2019-10-13 19:44:01,322 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 19:44:01,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:44:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 19:44:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-13 19:44:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 19:44:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-13 19:44:01,330 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 71 [2019-10-13 19:44:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:01,330 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-13 19:44:01,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:44:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-13 19:44:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 19:44:01,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:01,332 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:44:01,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:01,541 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash 778847808, now seen corresponding path program 6 times [2019-10-13 19:44:01,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:01,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498421340] [2019-10-13 19:44:01,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:01,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:01,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-13 19:44:01,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498421340] [2019-10-13 19:44:01,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926621969] [2019-10-13 19:44:01,705 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 [2019-10-13 19:44:01,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 19:44:01,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:01,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:44:01,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-10-13 19:44:01,885 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:01,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-13 19:44:01,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800962541] [2019-10-13 19:44:01,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:44:01,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:44:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:01,887 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 12 states. [2019-10-13 19:44:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:02,040 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-10-13 19:44:02,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:44:02,041 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-10-13 19:44:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:02,042 INFO L225 Difference]: With dead ends: 85 [2019-10-13 19:44:02,042 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 19:44:02,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 19:44:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-10-13 19:44:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 19:44:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-13 19:44:02,055 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 82 [2019-10-13 19:44:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:02,056 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-13 19:44:02,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:44:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-13 19:44:02,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 19:44:02,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:02,059 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 7, 7, 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] [2019-10-13 19:44:02,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:02,263 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash 27018272, now seen corresponding path program 7 times [2019-10-13 19:44:02,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:02,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189410115] [2019-10-13 19:44:02,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:02,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:02,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 19:44:02,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189410115] [2019-10-13 19:44:02,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780192306] [2019-10-13 19:44:02,403 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 [2019-10-13 19:44:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:44:02,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 19:44:02,520 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:02,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 19:44:02,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144817837] [2019-10-13 19:44:02,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:44:02,521 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:44:02,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:02,522 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-10-13 19:44:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:02,626 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2019-10-13 19:44:02,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:44:02,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-10-13 19:44:02,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:02,627 INFO L225 Difference]: With dead ends: 88 [2019-10-13 19:44:02,628 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 19:44:02,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 19:44:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-13 19:44:02,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 19:44:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-10-13 19:44:02,634 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 86 [2019-10-13 19:44:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:02,634 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-10-13 19:44:02,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:44:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-10-13 19:44:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 19:44:02,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:02,636 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 8, 8, 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] [2019-10-13 19:44:02,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:02,837 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:02,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1793036866, now seen corresponding path program 8 times [2019-10-13 19:44:02,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:02,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234068397] [2019-10-13 19:44:02,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:02,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:02,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 19:44:02,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234068397] [2019-10-13 19:44:02,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261696660] [2019-10-13 19:44:02,993 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 [2019-10-13 19:44:03,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:44:03,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:03,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:44:03,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 19:44:03,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:03,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 19:44:03,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262549263] [2019-10-13 19:44:03,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:44:03,131 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:44:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:44:03,132 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 13 states. [2019-10-13 19:44:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:03,252 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-10-13 19:44:03,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:44:03,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-10-13 19:44:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:03,253 INFO L225 Difference]: With dead ends: 90 [2019-10-13 19:44:03,254 INFO L226 Difference]: Without dead ends: 58 [2019-10-13 19:44:03,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:44:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-13 19:44:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-13 19:44:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 19:44:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-10-13 19:44:03,261 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 88 [2019-10-13 19:44:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:03,277 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-10-13 19:44:03,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:44:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-10-13 19:44:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 19:44:03,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:03,278 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 9, 9, 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] [2019-10-13 19:44:03,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:03,479 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1870143516, now seen corresponding path program 9 times [2019-10-13 19:44:03,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:03,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335831522] [2019-10-13 19:44:03,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:03,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:03,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-13 19:44:03,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335831522] [2019-10-13 19:44:03,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295915832] [2019-10-13 19:44:03,641 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 [2019-10-13 19:44:03,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 19:44:03,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:03,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:44:03,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-10-13 19:44:03,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:03,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-13 19:44:03,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464045596] [2019-10-13 19:44:03,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:44:03,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:44:03,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:44:03,771 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 16 states. [2019-10-13 19:44:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:03,975 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2019-10-13 19:44:03,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:44:03,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-10-13 19:44:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:03,976 INFO L225 Difference]: With dead ends: 94 [2019-10-13 19:44:03,976 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 19:44:03,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:44:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 19:44:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-10-13 19:44:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 19:44:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-10-13 19:44:03,983 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 90 [2019-10-13 19:44:03,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:03,983 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-10-13 19:44:03,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:44:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-10-13 19:44:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 19:44:03,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:03,985 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 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] [2019-10-13 19:44:04,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:04,190 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:04,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:04,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1573371196, now seen corresponding path program 10 times [2019-10-13 19:44:04,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:04,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268063085] [2019-10-13 19:44:04,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:04,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:04,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-13 19:44:04,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268063085] [2019-10-13 19:44:04,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139779650] [2019-10-13 19:44:04,324 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 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 [2019-10-13 19:44:04,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:44:04,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:04,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 19:44:04,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 116 proven. 22 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-13 19:44:04,427 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:04,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-13 19:44:04,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445379690] [2019-10-13 19:44:04,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:44:04,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:44:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:44:04,429 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 8 states. [2019-10-13 19:44:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:04,594 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-10-13 19:44:04,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:44:04,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 94 [2019-10-13 19:44:04,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:04,596 INFO L225 Difference]: With dead ends: 99 [2019-10-13 19:44:04,597 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 19:44:04,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:44:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 19:44:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-10-13 19:44:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 19:44:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-10-13 19:44:04,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 94 [2019-10-13 19:44:04,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:04,604 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-10-13 19:44:04,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:44:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-10-13 19:44:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 19:44:04,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:04,606 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 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] [2019-10-13 19:44:04,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:04,810 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:04,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2058184687, now seen corresponding path program 11 times [2019-10-13 19:44:04,811 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:04,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603684553] [2019-10-13 19:44:04,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:04,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:04,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-13 19:44:04,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603684553] [2019-10-13 19:44:04,996 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477417071] [2019-10-13 19:44:04,996 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 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 [2019-10-13 19:44:05,425 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-13 19:44:05,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:05,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:44:05,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 174 proven. 35 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-13 19:44:05,446 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:05,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-10-13 19:44:05,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509790991] [2019-10-13 19:44:05,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:44:05,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:44:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:44:05,448 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 9 states. [2019-10-13 19:44:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:05,624 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2019-10-13 19:44:05,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:44:05,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2019-10-13 19:44:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:05,625 INFO L225 Difference]: With dead ends: 105 [2019-10-13 19:44:05,626 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 19:44:05,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:44:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 19:44:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-10-13 19:44:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 19:44:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2019-10-13 19:44:05,633 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 103 [2019-10-13 19:44:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:05,633 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2019-10-13 19:44:05,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:44:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2019-10-13 19:44:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 19:44:05,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:05,635 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 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] [2019-10-13 19:44:05,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:05,840 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1611383708, now seen corresponding path program 12 times [2019-10-13 19:44:05,842 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:05,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440068547] [2019-10-13 19:44:05,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:05,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:05,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 124 proven. 175 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-10-13 19:44:06,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440068547] [2019-10-13 19:44:06,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515277978] [2019-10-13 19:44:06,054 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 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 [2019-10-13 19:44:06,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 19:44:06,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:06,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:44:06,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 250 proven. 9 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-10-13 19:44:06,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:06,214 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 19:44:06,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471776142] [2019-10-13 19:44:06,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:44:06,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:06,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:44:06,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:44:06,216 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 14 states. [2019-10-13 19:44:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:06,484 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2019-10-13 19:44:06,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:44:06,485 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 112 [2019-10-13 19:44:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:06,486 INFO L225 Difference]: With dead ends: 114 [2019-10-13 19:44:06,486 INFO L226 Difference]: Without dead ends: 75 [2019-10-13 19:44:06,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:44:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-13 19:44:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-10-13 19:44:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-13 19:44:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2019-10-13 19:44:06,494 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 112 [2019-10-13 19:44:06,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:06,494 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2019-10-13 19:44:06,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:44:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2019-10-13 19:44:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 19:44:06,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:06,496 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 10, 10, 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] [2019-10-13 19:44:06,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:06,701 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:06,702 INFO L82 PathProgramCache]: Analyzing trace with hash 2115527283, now seen corresponding path program 13 times [2019-10-13 19:44:06,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:06,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483195978] [2019-10-13 19:44:06,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:06,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:06,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 165 proven. 235 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-10-13 19:44:06,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483195978] [2019-10-13 19:44:06,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032604786] [2019-10-13 19:44:06,962 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:07,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:44:07,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 326 proven. 70 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2019-10-13 19:44:07,117 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:07,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2019-10-13 19:44:07,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092680812] [2019-10-13 19:44:07,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:44:07,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:07,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:44:07,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:44:07,121 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 11 states. [2019-10-13 19:44:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:07,352 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-10-13 19:44:07,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:44:07,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 123 [2019-10-13 19:44:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:07,353 INFO L225 Difference]: With dead ends: 121 [2019-10-13 19:44:07,354 INFO L226 Difference]: Without dead ends: 77 [2019-10-13 19:44:07,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:44:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-13 19:44:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-10-13 19:44:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 19:44:07,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2019-10-13 19:44:07,365 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 123 [2019-10-13 19:44:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:07,365 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2019-10-13 19:44:07,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:44:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2019-10-13 19:44:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 19:44:07,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:07,367 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 10, 10, 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] [2019-10-13 19:44:07,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:07,579 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:07,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:07,580 INFO L82 PathProgramCache]: Analyzing trace with hash -638066878, now seen corresponding path program 14 times [2019-10-13 19:44:07,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:07,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084968427] [2019-10-13 19:44:07,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:07,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:07,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2019-10-13 19:44:07,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084968427] [2019-10-13 19:44:07,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845864177] [2019-10-13 19:44:07,781 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:07,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:44:07,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:07,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:44:07,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-10-13 19:44:07,903 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:07,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2019-10-13 19:44:07,904 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203397959] [2019-10-13 19:44:07,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:44:07,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:44:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:07,905 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 12 states. [2019-10-13 19:44:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:08,138 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2019-10-13 19:44:08,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:44:08,138 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2019-10-13 19:44:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:08,139 INFO L225 Difference]: With dead ends: 127 [2019-10-13 19:44:08,139 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 19:44:08,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:44:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 19:44:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2019-10-13 19:44:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-13 19:44:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2019-10-13 19:44:08,146 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 132 [2019-10-13 19:44:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:08,147 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2019-10-13 19:44:08,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:44:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2019-10-13 19:44:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 19:44:08,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:08,149 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 27, 10, 10, 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] [2019-10-13 19:44:08,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:08,354 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:08,355 INFO L82 PathProgramCache]: Analyzing trace with hash -720039853, now seen corresponding path program 15 times [2019-10-13 19:44:08,355 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:08,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554068245] [2019-10-13 19:44:08,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:08,356 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:08,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 265 proven. 382 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2019-10-13 19:44:08,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554068245] [2019-10-13 19:44:08,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711930924] [2019-10-13 19:44:08,604 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:08,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:44:08,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:08,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 19:44:08,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 532 proven. 16 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-10-13 19:44:08,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:08,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-13 19:44:08,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761963090] [2019-10-13 19:44:08,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:44:08,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:08,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:44:08,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:44:08,840 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 19 states. [2019-10-13 19:44:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:09,203 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2019-10-13 19:44:09,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:44:09,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2019-10-13 19:44:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:09,205 INFO L225 Difference]: With dead ends: 134 [2019-10-13 19:44:09,205 INFO L226 Difference]: Without dead ends: 84 [2019-10-13 19:44:09,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:44:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-13 19:44:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-10-13 19:44:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 19:44:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2019-10-13 19:44:09,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 141 [2019-10-13 19:44:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:09,216 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2019-10-13 19:44:09,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:44:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2019-10-13 19:44:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 19:44:09,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:09,219 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 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] [2019-10-13 19:44:09,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:09,426 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:09,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1444910496, now seen corresponding path program 16 times [2019-10-13 19:44:09,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:09,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011810684] [2019-10-13 19:44:09,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:09,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:09,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-13 19:44:09,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011810684] [2019-10-13 19:44:09,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889530405] [2019-10-13 19:44:09,666 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:09,825 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:44:09,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:09,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:44:09,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1535 backedges. 650 proven. 25 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-13 19:44:09,854 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:09,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 19:44:09,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565669100] [2019-10-13 19:44:09,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:44:09,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:09,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:44:09,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:44:09,856 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 10 states. [2019-10-13 19:44:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:09,949 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2019-10-13 19:44:09,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:44:09,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 152 [2019-10-13 19:44:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:09,951 INFO L225 Difference]: With dead ends: 127 [2019-10-13 19:44:09,951 INFO L226 Difference]: Without dead ends: 86 [2019-10-13 19:44:09,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:44:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-13 19:44:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-13 19:44:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-13 19:44:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2019-10-13 19:44:09,956 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 152 [2019-10-13 19:44:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:09,957 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2019-10-13 19:44:09,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:44:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2019-10-13 19:44:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 19:44:09,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:09,959 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:44:10,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:10,164 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1810174302, now seen corresponding path program 17 times [2019-10-13 19:44:10,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:10,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869104209] [2019-10-13 19:44:10,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:10,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:10,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-13 19:44:10,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869104209] [2019-10-13 19:44:10,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204611011] [2019-10-13 19:44:10,365 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:11,751 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-13 19:44:11,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:11,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 19:44:11,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-13 19:44:11,786 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:11,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 19:44:11,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840177536] [2019-10-13 19:44:11,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:44:11,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:44:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:44:11,788 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 11 states. [2019-10-13 19:44:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:11,870 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2019-10-13 19:44:11,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:44:11,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 154 [2019-10-13 19:44:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:11,872 INFO L225 Difference]: With dead ends: 129 [2019-10-13 19:44:11,872 INFO L226 Difference]: Without dead ends: 88 [2019-10-13 19:44:11,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:44:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-13 19:44:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-10-13 19:44:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 19:44:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2019-10-13 19:44:11,881 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 154 [2019-10-13 19:44:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:11,881 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2019-10-13 19:44:11,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:44:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2019-10-13 19:44:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 19:44:11,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:11,884 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:44:12,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:12,085 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash 641373596, now seen corresponding path program 18 times [2019-10-13 19:44:12,086 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:12,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410241349] [2019-10-13 19:44:12,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:12,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:12,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-13 19:44:12,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410241349] [2019-10-13 19:44:12,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527719979] [2019-10-13 19:44:12,304 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:12,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 19:44:12,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:12,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 19:44:12,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 650 proven. 49 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-13 19:44:12,732 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:12,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 19:44:12,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461470270] [2019-10-13 19:44:12,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:44:12,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:12,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:44:12,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:12,733 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 12 states. [2019-10-13 19:44:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:12,863 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2019-10-13 19:44:12,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:44:12,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 156 [2019-10-13 19:44:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:12,864 INFO L225 Difference]: With dead ends: 131 [2019-10-13 19:44:12,864 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 19:44:12,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:44:12,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 19:44:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 19:44:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 19:44:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2019-10-13 19:44:12,872 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 156 [2019-10-13 19:44:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:12,873 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2019-10-13 19:44:12,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:44:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2019-10-13 19:44:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 19:44:12,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:12,876 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:44:13,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:13,083 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:13,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:13,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1589640614, now seen corresponding path program 19 times [2019-10-13 19:44:13,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:13,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545237043] [2019-10-13 19:44:13,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:13,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:13,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2019-10-13 19:44:13,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545237043] [2019-10-13 19:44:13,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032379354] [2019-10-13 19:44:13,327 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:13,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 19:44:13,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 650 proven. 64 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2019-10-13 19:44:13,478 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:13,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 19:44:13,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045239636] [2019-10-13 19:44:13,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:44:13,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:44:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:44:13,480 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand 13 states. [2019-10-13 19:44:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:13,597 INFO L93 Difference]: Finished difference Result 132 states and 157 transitions. [2019-10-13 19:44:13,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:44:13,598 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 158 [2019-10-13 19:44:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:13,599 INFO L225 Difference]: With dead ends: 132 [2019-10-13 19:44:13,599 INFO L226 Difference]: Without dead ends: 91 [2019-10-13 19:44:13,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:44:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-13 19:44:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-10-13 19:44:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 19:44:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2019-10-13 19:44:13,605 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 158 [2019-10-13 19:44:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:13,606 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2019-10-13 19:44:13,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:44:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2019-10-13 19:44:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 19:44:13,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:13,608 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:44:13,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:13,812 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:13,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1889351576, now seen corresponding path program 20 times [2019-10-13 19:44:13,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:13,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070788001] [2019-10-13 19:44:13,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:13,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:13,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2019-10-13 19:44:15,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070788001] [2019-10-13 19:44:15,161 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105801990] [2019-10-13 19:44:15,161 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:15,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:44:15,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:44:15,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-13 19:44:15,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:15,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:44:15,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:44:16,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:44:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-13 19:44:16,412 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:16,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 40] total 44 [2019-10-13 19:44:16,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896600027] [2019-10-13 19:44:16,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-13 19:44:16,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:16,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-13 19:44:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1778, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 19:44:16,416 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand 44 states. [2019-10-13 19:44:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:19,360 INFO L93 Difference]: Finished difference Result 299 states and 417 transitions. [2019-10-13 19:44:19,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 19:44:19,360 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 160 [2019-10-13 19:44:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:19,365 INFO L225 Difference]: With dead ends: 299 [2019-10-13 19:44:19,365 INFO L226 Difference]: Without dead ends: 295 [2019-10-13 19:44:19,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 157 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=285, Invalid=5415, Unknown=0, NotChecked=0, Total=5700 [2019-10-13 19:44:19,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-10-13 19:44:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 233. [2019-10-13 19:44:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-10-13 19:44:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2019-10-13 19:44:19,419 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 160 [2019-10-13 19:44:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:19,420 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2019-10-13 19:44:19,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-13 19:44:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2019-10-13 19:44:19,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 19:44:19,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:19,423 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 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] [2019-10-13 19:44:19,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:19,627 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1725557350, now seen corresponding path program 1 times [2019-10-13 19:44:19,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:19,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957591026] [2019-10-13 19:44:19,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:19,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:19,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:44:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 324 proven. 864 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-10-13 19:44:20,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957591026] [2019-10-13 19:44:20,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969798430] [2019-10-13 19:44:20,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:44:21,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-13 19:44:21,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:44:21,199 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 19:44:21,203 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 [2019-10-13 19:44:21,204 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:44:21,210 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:44:21,210 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:44:21,211 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2019-10-13 19:44:21,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:44:21,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:44:21,400 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 [2019-10-13 19:44:21,401 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:44:21,405 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:44:21,405 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:44:21,406 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:11 [2019-10-13 19:44:21,413 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 [2019-10-13 19:44:21,413 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 19:44:21,420 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 19:44:21,421 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 19:44:21,421 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2019-10-13 19:44:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2019-10-13 19:44:22,310 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:44:22,310 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 39 [2019-10-13 19:44:22,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110180581] [2019-10-13 19:44:22,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 19:44:22,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:44:22,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 19:44:22,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 19:44:22,312 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand 39 states. [2019-10-13 19:44:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:44:30,706 INFO L93 Difference]: Finished difference Result 1266 states and 1759 transitions. [2019-10-13 19:44:30,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2019-10-13 19:44:30,713 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 160 [2019-10-13 19:44:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:44:30,720 INFO L225 Difference]: With dead ends: 1266 [2019-10-13 19:44:30,720 INFO L226 Difference]: Without dead ends: 956 [2019-10-13 19:44:30,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10758 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1693, Invalid=26699, Unknown=0, NotChecked=0, Total=28392 [2019-10-13 19:44:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2019-10-13 19:44:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 601. [2019-10-13 19:44:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-10-13 19:44:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 806 transitions. [2019-10-13 19:44:30,803 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 806 transitions. Word has length 160 [2019-10-13 19:44:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:44:30,803 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 806 transitions. [2019-10-13 19:44:30,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 19:44:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 806 transitions. [2019-10-13 19:44:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-13 19:44:30,809 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:44:30,810 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 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] [2019-10-13 19:44:31,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:44:31,016 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:44:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:44:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2147450282, now seen corresponding path program 2 times [2019-10-13 19:44:31,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:44:31,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386425372] [2019-10-13 19:44:31,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:31,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:44:31,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY