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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/nla-digbench/lcm1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:12:30,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:12:30,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:12:30,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:12:30,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:12:30,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:12:30,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:12:30,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:12:30,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:12:30,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:12:30,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:12:30,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:12:30,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:12:30,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:12:30,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:12:30,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:12:30,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:12:30,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:12:30,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:12:30,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:12:30,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:12:30,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:12:30,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:12:30,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:12:30,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-03 21:12:30,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-03 21:12:30,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-03 21:12:30,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-03 21:12:30,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-03 21:12:30,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-03 21:12:30,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:12:30,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:12:30,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:12:30,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:12:30,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:12:30,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:12:30,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:12:30,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 21:12:30,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 21:12:30,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 21:12:30,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 21:12:30,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 21:12:30,703 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:12:30,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:12:30,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:12:30,704 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:12:30,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:12:30,705 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:12:30,705 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:12:30,705 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:12:30,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:12:30,706 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:12:30,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:12:30,706 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:12:30,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:12:30,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:12:30,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:12:30,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:12:30,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:12:30,708 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:12:30,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:12:30,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:12:30,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:12:30,708 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:12:30,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:12:30,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:12:30,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:12:30,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:12:30,709 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:12:30,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:12:30,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:12:30,710 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:12:30,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:12:30,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:12:30,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:12:30,757 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:12:30,757 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:12:30,758 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm1.c [2019-09-03 21:12:30,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb496a253/3c26c9125f874c07a4628e71fc943d49/FLAGb2a92e5d5 [2019-09-03 21:12:31,202 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:12:31,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm1.c [2019-09-03 21:12:31,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb496a253/3c26c9125f874c07a4628e71fc943d49/FLAGb2a92e5d5 [2019-09-03 21:12:31,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb496a253/3c26c9125f874c07a4628e71fc943d49 [2019-09-03 21:12:31,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:12:31,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:12:31,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:12:31,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:12:31,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:12:31,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c157ce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31, skipping insertion in model container [2019-09-03 21:12:31,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,605 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:12:31,622 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:12:31,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:12:31,789 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:12:31,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:12:31,825 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:12:31,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31 WrapperNode [2019-09-03 21:12:31,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:12:31,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:12:31,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:12:31,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:12:31,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... [2019-09-03 21:12:31,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:12:31,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:12:31,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:12:31,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:12:31,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:12:32,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:12:32,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:12:32,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:12:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:12:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:12:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:12:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:12:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:12:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:12:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:12:32,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:12:32,272 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:12:32,272 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-03 21:12:32,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:12:32 BoogieIcfgContainer [2019-09-03 21:12:32,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:12:32,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:12:32,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:12:32,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:12:32,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:12:31" (1/3) ... [2019-09-03 21:12:32,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc03957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:12:32, skipping insertion in model container [2019-09-03 21:12:32,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:31" (2/3) ... [2019-09-03 21:12:32,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc03957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:12:32, skipping insertion in model container [2019-09-03 21:12:32,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:12:32" (3/3) ... [2019-09-03 21:12:32,289 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm1.c [2019-09-03 21:12:32,302 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:12:32,309 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:12:32,339 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:12:32,365 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:12:32,365 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:12:32,365 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:12:32,365 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:12:32,366 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:12:32,366 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:12:32,366 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:12:32,366 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:12:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-03 21:12:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:12:32,390 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:32,391 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:32,393 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:32,399 INFO L82 PathProgramCache]: Analyzing trace with hash -831554694, now seen corresponding path program 1 times [2019-09-03 21:12:32,401 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:32,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:32,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:32,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:32,442 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:32,513 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:32,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:12:32,513 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:32,516 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:12:32,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:12:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:12:32,529 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-09-03 21:12:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:32,548 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2019-09-03 21:12:32,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:12:32,549 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:12:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:32,558 INFO L225 Difference]: With dead ends: 27 [2019-09-03 21:12:32,558 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 21:12:32,560 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:12:32,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 21:12:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-03 21:12:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 21:12:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-09-03 21:12:32,591 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2019-09-03 21:12:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:32,592 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-09-03 21:12:32,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:12:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-09-03 21:12:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:12:32,593 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:32,593 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:32,593 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash -871444843, now seen corresponding path program 1 times [2019-09-03 21:12:32,594 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:32,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:32,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:32,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:32,597 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:32,612 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:32,612 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:32,612 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) [2019-09-03 21:12:32,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:32,629 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:12:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:32,643 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:12:32,644 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:12:32,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:32,644 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:32,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:32,659 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:32,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 21:12:32,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:32,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:32,769 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:32,849 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:32,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:12:32,849 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:32,850 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:12:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:12:32,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:12:32,851 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 5 states. [2019-09-03 21:12:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:32,984 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2019-09-03 21:12:32,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:12:32,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:12:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:32,988 INFO L225 Difference]: With dead ends: 37 [2019-09-03 21:12:32,988 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 21:12:32,989 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:12:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 21:12:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-09-03 21:12:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-03 21:12:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-09-03 21:12:33,014 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 10 [2019-09-03 21:12:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:33,014 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-09-03 21:12:33,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:12:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2019-09-03 21:12:33,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 21:12:33,016 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:33,017 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:33,017 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1387131099, now seen corresponding path program 1 times [2019-09-03 21:12:33,018 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:33,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:33,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:33,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:33,021 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:33,034 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:33,034 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:33,035 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-03 21:12:33,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:33,052 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:12:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:33,063 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-03 21:12:33,065 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [83] [2019-09-03 21:12:33,095 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:33,096 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:33,248 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:33,252 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-03 21:12:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:33,256 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:33,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:33,256 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:33,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:33,267 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:33,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 21:12:33,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:33,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:33,377 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:33,485 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:33,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-09-03 21:12:33,485 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:33,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 21:12:33,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 21:12:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:12:33,486 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2019-09-03 21:12:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:33,662 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2019-09-03 21:12:33,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:12:33,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-09-03 21:12:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:33,665 INFO L225 Difference]: With dead ends: 54 [2019-09-03 21:12:33,665 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 21:12:33,666 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-09-03 21:12:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 21:12:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-03 21:12:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 21:12:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2019-09-03 21:12:33,684 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 16 [2019-09-03 21:12:33,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:33,685 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2019-09-03 21:12:33,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 21:12:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2019-09-03 21:12:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 21:12:33,687 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:33,688 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:33,688 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1615934296, now seen corresponding path program 1 times [2019-09-03 21:12:33,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:33,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:33,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:33,691 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:33,705 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:33,705 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:33,705 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-03 21:12:33,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:33,719 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:12:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:33,732 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2019-09-03 21:12:33,733 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [28], [34], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80] [2019-09-03 21:12:33,738 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:33,739 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:33,791 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:33,791 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-03 21:12:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:33,797 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:33,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:33,797 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:33,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:33,820 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:33,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 21:12:33,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:33,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 21:12:33,901 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 21:12:33,976 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 21:12:33,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-09-03 21:12:33,977 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:33,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:12:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:12:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:12:33,978 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 5 states. [2019-09-03 21:12:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:34,049 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2019-09-03 21:12:34,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:12:34,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-03 21:12:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:34,051 INFO L225 Difference]: With dead ends: 52 [2019-09-03 21:12:34,051 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 21:12:34,051 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:12:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 21:12:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2019-09-03 21:12:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 21:12:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-09-03 21:12:34,058 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 24 [2019-09-03 21:12:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:34,059 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-09-03 21:12:34,059 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:12:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-09-03 21:12:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 21:12:34,060 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:34,061 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:34,061 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:34,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:34,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1467183567, now seen corresponding path program 1 times [2019-09-03 21:12:34,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:34,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:34,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:34,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:34,063 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:34,068 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:34,068 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:34,069 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-03 21:12:34,084 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:34,084 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:12:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:34,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2019-09-03 21:12:34,100 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [28], [32], [45], [49], [51], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80], [81], [82], [83] [2019-09-03 21:12:34,106 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:34,106 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:34,133 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:34,133 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-03 21:12:34,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:34,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:34,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:34,134 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:34,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:34,155 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:34,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 21:12:34,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:34,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 21:12:34,299 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 21:12:34,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:12:34,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-03 21:12:34,488 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:12:34,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 21:12:34,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 21:12:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-03 21:12:34,491 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 14 states. [2019-09-03 21:12:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:36,531 INFO L93 Difference]: Finished difference Result 134 states and 192 transitions. [2019-09-03 21:12:36,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 21:12:36,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-09-03 21:12:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:36,536 INFO L225 Difference]: With dead ends: 134 [2019-09-03 21:12:36,536 INFO L226 Difference]: Without dead ends: 126 [2019-09-03 21:12:36,537 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2019-09-03 21:12:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-03 21:12:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2019-09-03 21:12:36,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-03 21:12:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2019-09-03 21:12:36,551 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 44 [2019-09-03 21:12:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:36,552 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2019-09-03 21:12:36,552 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 21:12:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2019-09-03 21:12:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 21:12:36,554 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:36,554 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:36,554 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1303301358, now seen corresponding path program 1 times [2019-09-03 21:12:36,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:36,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:36,556 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:36,560 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:36,561 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:36,561 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-03 21:12:36,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:36,581 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:12:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:36,594 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2019-09-03 21:12:36,595 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [28], [32], [34], [45], [49], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80], [81], [82], [83], [84], [85] [2019-09-03 21:12:36,601 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:36,602 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:36,619 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:36,619 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-03 21:12:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:36,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:36,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:36,620 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:36,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:36,634 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:36,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 21:12:36,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:36,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-03 21:12:36,710 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-03 21:12:36,765 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:36,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-09-03 21:12:36,766 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:36,766 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 21:12:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 21:12:36,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:12:36,767 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 6 states. [2019-09-03 21:12:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:36,826 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2019-09-03 21:12:36,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:12:36,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-09-03 21:12:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:36,828 INFO L225 Difference]: With dead ends: 100 [2019-09-03 21:12:36,828 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 21:12:36,828 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:12:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 21:12:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-03 21:12:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-03 21:12:36,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2019-09-03 21:12:36,838 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 49 [2019-09-03 21:12:36,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:36,839 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2019-09-03 21:12:36,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 21:12:36,839 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2019-09-03 21:12:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-03 21:12:36,841 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:36,842 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:36,842 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:36,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1401665144, now seen corresponding path program 1 times [2019-09-03 21:12:36,842 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:36,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:36,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:36,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:36,844 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:36,856 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:36,857 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:36,857 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-03 21:12:36,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:36,890 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:12:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:36,906 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 52 with the following transitions: [2019-09-03 21:12:36,906 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [28], [32], [34], [45], [49], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80], [81], [82], [83] [2019-09-03 21:12:36,910 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:36,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:36,924 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:36,924 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 30 root evaluator evaluations with a maximum evaluation depth of 7. Performed 30 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 8 variables. [2019-09-03 21:12:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:36,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:36,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:36,925 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:36,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:36,947 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:36,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 21:12:36,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:37,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-09-03 21:12:37,083 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:37,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:37,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-09-03 21:12:37,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:12:37,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-09-03 21:12:37,254 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:12:37,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 21:12:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 21:12:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-09-03 21:12:37,255 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand 15 states. [2019-09-03 21:12:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:37,467 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2019-09-03 21:12:37,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 21:12:37,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-09-03 21:12:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:37,468 INFO L225 Difference]: With dead ends: 77 [2019-09-03 21:12:37,468 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 21:12:37,469 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-09-03 21:12:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 21:12:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 21:12:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 21:12:37,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 21:12:37,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2019-09-03 21:12:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:37,470 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 21:12:37,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 21:12:37,471 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 21:12:37,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 21:12:37,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 09:12:37 BoogieIcfgContainer [2019-09-03 21:12:37,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 21:12:37,478 INFO L168 Benchmark]: Toolchain (without parser) took 5889.52 ms. Allocated memory was 138.4 MB in the beginning and 262.7 MB in the end (delta: 124.3 MB). Free memory was 86.2 MB in the beginning and 207.6 MB in the end (delta: -121.4 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:37,478 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 104.4 MB in the beginning and 104.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:12:37,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.37 ms. Allocated memory is still 138.4 MB. Free memory was 85.8 MB in the beginning and 75.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:37,480 INFO L168 Benchmark]: Boogie Preprocessor took 156.90 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 75.9 MB in the beginning and 178.7 MB in the end (delta: -102.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:37,481 INFO L168 Benchmark]: RCFGBuilder took 290.29 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 165.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:37,482 INFO L168 Benchmark]: TraceAbstraction took 5200.54 ms. Allocated memory was 200.8 MB in the beginning and 262.7 MB in the end (delta: 61.9 MB). Free memory was 165.3 MB in the beginning and 207.6 MB in the end (delta: -42.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:37,486 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.4 MB. Free memory was 104.4 MB in the beginning and 104.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.37 ms. Allocated memory is still 138.4 MB. Free memory was 85.8 MB in the beginning and 75.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.90 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 75.9 MB in the beginning and 178.7 MB in the end (delta: -102.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 290.29 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 165.9 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5200.54 ms. Allocated memory was 200.8 MB in the beginning and 262.7 MB in the end (delta: 61.9 MB). Free memory was 165.3 MB in the beginning and 207.6 MB in the end (delta: -42.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 5.1s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 2.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 139 SDslu, 695 SDs, 0 SdLazy, 695 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 399 GetRequests, 329 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 398 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 385 ConstructedInterpolants, 6 QuantifiedInterpolants, 70612 SizeOfPredicates, 25 NumberOfNonLiveVariables, 466 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 432/460 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...