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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/nla-digbench/ps5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:06:42,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:06:42,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:06:42,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:06:42,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:06:42,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:06:42,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:06:42,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:06:42,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:06:42,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:06:42,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:06:42,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:06:42,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:06:42,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:06:42,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:06:42,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:06:42,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:06:42,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:06:42,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:06:42,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:06:42,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:06:42,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:06:42,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:06:42,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:06:42,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:06:42,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:06:42,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:06:42,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:06:42,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:06:42,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:06:42,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:06:42,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:06:42,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:06:42,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:06:42,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:06:42,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:06:42,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:06:42,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:06:42,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:06:42,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:06:42,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:06:42,395 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 [2019-10-15 01:06:42,408 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:06:42,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:06:42,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:06:42,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:06:42,409 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:06:42,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:06:42,410 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:06:42,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:06:42,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:06:42,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:06:42,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:06:42,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:06:42,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:06:42,411 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:06:42,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:06:42,412 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:06:42,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:06:42,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:06:42,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:06:42,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:06:42,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:06:42,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:06:42,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:06:42,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:06:42,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:06:42,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:06:42,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:06:42,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:06:42,414 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:06:42,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:06:42,704 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:06:42,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:06:42,709 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:06:42,710 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:06:42,710 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps5.c [2019-10-15 01:06:42,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50c656908/7bb13667a55d4e21aa8cf615b181c5fb/FLAG91d21c04c [2019-10-15 01:06:43,239 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:06:43,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps5.c [2019-10-15 01:06:43,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50c656908/7bb13667a55d4e21aa8cf615b181c5fb/FLAG91d21c04c [2019-10-15 01:06:43,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50c656908/7bb13667a55d4e21aa8cf615b181c5fb [2019-10-15 01:06:43,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:06:43,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:06:43,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:43,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:06:43,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:06:43,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:43,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f759b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43, skipping insertion in model container [2019-10-15 01:06:43,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:43,700 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:06:43,720 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:06:43,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:43,908 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:06:43,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:06:43,939 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:06:43,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43 WrapperNode [2019-10-15 01:06:43,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:06:43,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:06:43,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:06:43,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:06:44,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (1/1) ... [2019-10-15 01:06:44,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:06:44,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:06:44,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:06:44,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:06:44,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (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 [2019-10-15 01:06:44,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:06:44,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:06:44,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:06:44,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:06:44,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:06:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:06:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:06:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:06:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:06:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:06:44,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:06:44,260 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:06:44,261 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:06:44,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:44 BoogieIcfgContainer [2019-10-15 01:06:44,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:06:44,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:06:44,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:06:44,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:06:44,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:06:43" (1/3) ... [2019-10-15 01:06:44,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4ed259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:44, skipping insertion in model container [2019-10-15 01:06:44,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:06:43" (2/3) ... [2019-10-15 01:06:44,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4ed259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:06:44, skipping insertion in model container [2019-10-15 01:06:44,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:06:44" (3/3) ... [2019-10-15 01:06:44,271 INFO L109 eAbstractionObserver]: Analyzing ICFG ps5.c [2019-10-15 01:06:44,281 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:06:44,293 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:06:44,319 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:06:44,351 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:06:44,351 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:06:44,352 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:06:44,352 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:06:44,352 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:06:44,353 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:06:44,353 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:06:44,353 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:06:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:06:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:44,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:44,386 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:44,389 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:44,395 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-10-15 01:06:44,405 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:44,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116008992] [2019-10-15 01:06:44,406 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:44,406 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:44,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:44,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116008992] [2019-10-15 01:06:44,519 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:44,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:06:44,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184285835] [2019-10-15 01:06:44,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:06:44,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:06:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:06:44,538 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-15 01:06:44,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:44,560 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-10-15 01:06:44,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:06:44,562 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 01:06:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:44,571 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:06:44,572 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:06:44,575 INFO L600 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 [2019-10-15 01:06:44,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:06:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 01:06:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:06:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-15 01:06:44,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-15 01:06:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:44,616 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-15 01:06:44,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:06:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-15 01:06:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:06:44,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:44,618 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:44,618 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:44,619 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-10-15 01:06:44,619 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:44,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112429141] [2019-10-15 01:06:44,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:44,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:44,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:44,627 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:44,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369068078] [2019-10-15 01:06:44,628 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 [2019-10-15 01:06:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:44,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:06:44,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:44,773 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:06:45,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112429141] [2019-10-15 01:06:45,031 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:06:45,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369068078] [2019-10-15 01:06:45,032 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:06:45,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 01:06:45,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349915506] [2019-10-15 01:06:45,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 01:06:45,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:06:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 01:06:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:06:45,038 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-10-15 01:06:45,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:06:45,242 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-15 01:06:45,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:06:45,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-15 01:06:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:06:45,244 INFO L225 Difference]: With dead ends: 27 [2019-10-15 01:06:45,245 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 01:06:45,247 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:06:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 01:06:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 01:06:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 01:06:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-15 01:06:45,264 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2019-10-15 01:06:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:06:45,264 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-15 01:06:45,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 01:06:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-15 01:06:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:06:45,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:06:45,268 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:06:45,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:06:45,472 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:06:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:06:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-10-15 01:06:45,473 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:06:45,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898594335] [2019-10-15 01:06:45,474 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:45,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:06:45,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:06:45,482 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:06:45,482 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981737087] [2019-10-15 01:06:45,483 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 [2019-10-15 01:06:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:06:45,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 01:06:45,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:06:45,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:06:45,676 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:06:48,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:50,531 WARN L838 $PredicateComparison]: unable to prove that (or (not (= 0 (mod (+ (* (* (* (* c_main_~y~0 10) c_main_~y~0) c_main_~y~0) 29) c_main_~y~0 (* (* (* (* (* c_main_~y~0 15) c_main_~y~0) c_main_~y~0) c_main_~y~0) 29) (* (* (* (* (* (* c_main_~y~0 6) c_main_~y~0) c_main_~y~0) c_main_~y~0) c_main_~y~0) 29)) (- 30)))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (let ((.cse0 (+ c_main_~y~0 1))) (= (* main_~k~0 .cse0) (* .cse0 .cse0))) (<= main_~k~0 c_main_~c~0)))) is different from false [2019-10-15 01:06:50,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:52,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:06:56,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:07:02,781 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((main_~k~0 Int) (v_main_~y~0_BEFORE_CALL_8 Int)) (or (= 0 (mod (+ (* (* (* (* v_main_~y~0_BEFORE_CALL_8 10) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 6) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 15) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) v_main_~y~0_BEFORE_CALL_8) (- 30))) (let ((.cse0 (+ v_main_~y~0_BEFORE_CALL_8 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0)))))) is different from true [2019-10-15 01:07:12,902 WARN L860 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((main_~k~0 Int) (v_main_~y~0_BEFORE_CALL_8 Int)) (or (= 0 (mod (+ (* (* (* (* v_main_~y~0_BEFORE_CALL_8 10) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 6) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) (* (* (* (* (* v_main_~y~0_BEFORE_CALL_8 15) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) v_main_~y~0_BEFORE_CALL_8) 29) v_main_~y~0_BEFORE_CALL_8) (- 30))) (let ((.cse0 (+ v_main_~y~0_BEFORE_CALL_8 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (= 0 c___VERIFIER_assert_~cond)) is different from true [2019-10-15 01:07:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 6 times theorem prover too weak. 6 trivial. 3 not checked. [2019-10-15 01:07:12,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898594335] [2019-10-15 01:07:12,929 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:07:12,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981737087] [2019-10-15 01:07:12,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [88181485] [2019-10-15 01:07:12,937 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 29 [2019-10-15 01:07:12,976 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:07:12,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:07:13,139 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:07:13,142 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 13. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 5 variables. [2019-10-15 01:07:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:13,150 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:07:13,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:07:13,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2019-10-15 01:07:13,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944303913] [2019-10-15 01:07:13,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 01:07:13,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:07:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 01:07:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=127, Unknown=3, NotChecked=72, Total=240 [2019-10-15 01:07:13,153 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 16 states. [2019-10-15 01:07:14,996 WARN L838 $PredicateComparison]: unable to prove that (and (or (= (* c_main_~k~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) (< c_main_~c~0 c_main_~k~0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (let ((.cse0 (+ c_main_~y~0 1))) (= (* main_~k~0 .cse0) (* .cse0 .cse0))) (<= main_~k~0 c_main_~c~0)))) is different from false [2019-10-15 01:07:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:07:17,285 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-10-15 01:07:17,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 01:07:17,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-10-15 01:07:17,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:07:17,287 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:07:17,288 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:07:17,289 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=66, Invalid=218, Unknown=4, NotChecked=132, Total=420 [2019-10-15 01:07:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:07:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-15 01:07:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:07:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-15 01:07:17,297 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2019-10-15 01:07:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:07:17,299 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-15 01:07:17,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 01:07:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-15 01:07:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:07:17,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:07:17,300 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:07:17,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:07:17,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:07:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:07:17,506 INFO L82 PathProgramCache]: Analyzing trace with hash -999891931, now seen corresponding path program 2 times [2019-10-15 01:07:17,506 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:07:17,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100897927] [2019-10-15 01:07:17,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:17,507 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:07:17,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:07:17,513 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:07:17,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746078796] [2019-10-15 01:07:17,513 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 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 [2019-10-15 01:07:17,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:07:17,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:07:17,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-15 01:07:17,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:07:17,858 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 6 [2019-10-15 01:07:17,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:07:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:07:17,979 INFO L321 TraceCheckSpWp]: Computing backward predicates...