java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 23:57:27,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:57:27,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:57:27,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 23:57:27,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 23:57:27,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 23:57:27,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 23:57:27,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 23:57:27,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 23:57:27,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 23:57:27,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 23:57:27,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 23:57:27,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:57:27,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:57:27,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:57:27,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:57:27,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:57:27,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:57:27,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:57:27,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:57:27,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:57:27,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:57:27,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:57:27,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:57:27,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 23:57:27,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-01 23:57:27,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-01 23:57:27,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-01 23:57:27,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-01 23:57:27,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-01 23:57:27,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-01 23:57:27,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-01 23:57:27,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-01 23:57:27,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:57:27,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:57:27,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:57:27,220 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 [2019-10-01 23:57:27,235 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:57:27,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:57:27,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:57:27,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:57:27,237 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:57:27,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:57:27,237 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:57:27,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:57:27,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:57:27,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:57:27,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:57:27,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:57:27,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:57:27,239 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:57:27,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:57:27,239 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:57:27,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:57:27,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:57:27,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:57:27,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:57:27,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:57:27,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:57:27,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:57:27,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:57:27,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:57:27,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:57:27,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:57:27,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:57:27,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:57:27,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:57:27,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:57:27,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:57:27,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:57:27,288 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:57:27,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-10-01 23:57:27,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2875464/4ab97957c67c48cbbf8266d91089a034/FLAG1933cd456 [2019-10-01 23:57:27,823 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:57:27,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/diff-3-n-u.c [2019-10-01 23:57:27,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2875464/4ab97957c67c48cbbf8266d91089a034/FLAG1933cd456 [2019-10-01 23:57:28,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2875464/4ab97957c67c48cbbf8266d91089a034 [2019-10-01 23:57:28,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:57:28,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:57:28,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:57:28,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:57:28,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:57:28,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283534bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28, skipping insertion in model container [2019-10-01 23:57:28,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,222 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:57:28,239 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:57:28,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:57:28,453 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:57:28,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:57:28,610 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:57:28,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28 WrapperNode [2019-10-01 23:57:28,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:57:28,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:57:28,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:57:28,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:57:28,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (1/1) ... [2019-10-01 23:57:28,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:57:28,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:57:28,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:57:28,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:57:28,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (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 [2019-10-01 23:57:28,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:57:28,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:57:28,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:57:28,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:57:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:57:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:57:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-01 23:57:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:57:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:57:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:57:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:57:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:57:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:57:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:57:29,050 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:57:29,050 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-01 23:57:29,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:57:29 BoogieIcfgContainer [2019-10-01 23:57:29,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:57:29,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:57:29,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:57:29,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:57:29,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:57:28" (1/3) ... [2019-10-01 23:57:29,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35461338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:57:29, skipping insertion in model container [2019-10-01 23:57:29,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:57:28" (2/3) ... [2019-10-01 23:57:29,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35461338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:57:29, skipping insertion in model container [2019-10-01 23:57:29,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:57:29" (3/3) ... [2019-10-01 23:57:29,060 INFO L109 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2019-10-01 23:57:29,070 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:57:29,080 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:57:29,100 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:57:29,136 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:57:29,136 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:57:29,136 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:57:29,137 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:57:29,137 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:57:29,137 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:57:29,137 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:57:29,137 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:57:29,137 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:57:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-10-01 23:57:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 23:57:29,160 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,161 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:29,163 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-10-01 23:57:29,171 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,280 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,280 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,280 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:29,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:29,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-01 23:57:29,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Exception during sending of exit command (exit): Stream closed [2019-10-01 23:57:29,401 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:29,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 23:57:29,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 23:57:29,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 23:57:29,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:57:29,423 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-10-01 23:57:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:29,453 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-10-01 23:57:29,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 23:57:29,455 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-01 23:57:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:29,464 INFO L225 Difference]: With dead ends: 66 [2019-10-01 23:57:29,465 INFO L226 Difference]: Without dead ends: 31 [2019-10-01 23:57:29,469 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:57:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-01 23:57:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-01 23:57:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-01 23:57:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-10-01 23:57:29,516 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-10-01 23:57:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:29,517 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-10-01 23:57:29,517 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 23:57:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-10-01 23:57:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-01 23:57:29,519 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,519 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:29,519 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-10-01 23:57:29,520 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,541 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:29,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:29,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:29,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:57:29,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:29,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:57:29,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:57:29,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:57:29,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:57:29,667 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 3 states. [2019-10-01 23:57:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:29,742 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-01 23:57:29,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:57:29,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-01 23:57:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:29,746 INFO L225 Difference]: With dead ends: 56 [2019-10-01 23:57:29,746 INFO L226 Difference]: Without dead ends: 36 [2019-10-01 23:57:29,747 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:57:29,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-01 23:57:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-01 23:57:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-01 23:57:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-01 23:57:29,762 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-01 23:57:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:29,763 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-01 23:57:29,763 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:57:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-01 23:57:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-01 23:57:29,766 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:29,766 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:29,766 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:29,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:29,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2133227694, now seen corresponding path program 1 times [2019-10-01 23:57:29,768 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:29,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:29,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:29,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:29,789 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:29,791 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:29,791 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-01 23:57:29,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:29,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:29,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:57:29,895 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:29,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:57:29,895 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:57:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:57:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:29,900 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-01 23:57:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:30,022 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2019-10-01 23:57:30,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:57:30,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-01 23:57:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:30,029 INFO L225 Difference]: With dead ends: 71 [2019-10-01 23:57:30,029 INFO L226 Difference]: Without dead ends: 46 [2019-10-01 23:57:30,030 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-01 23:57:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-10-01 23:57:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-01 23:57:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-01 23:57:30,057 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-01 23:57:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:30,058 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-01 23:57:30,058 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:57:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-01 23:57:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 23:57:30,060 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:30,060 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:30,061 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:30,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:30,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1108398309, now seen corresponding path program 1 times [2019-10-01 23:57:30,062 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:30,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:30,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,090 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:30,090 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:30,090 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:30,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:30,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:30,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:57:30,194 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:30,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:57:30,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:57:30,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:57:30,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:30,195 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 4 states. [2019-10-01 23:57:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:30,282 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-01 23:57:30,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:57:30,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-01 23:57:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:30,284 INFO L225 Difference]: With dead ends: 71 [2019-10-01 23:57:30,284 INFO L226 Difference]: Without dead ends: 43 [2019-10-01 23:57:30,285 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-01 23:57:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-10-01 23:57:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-01 23:57:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-01 23:57:30,294 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2019-10-01 23:57:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:30,294 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-01 23:57:30,294 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:57:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-01 23:57:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-01 23:57:30,295 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:30,296 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:30,296 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1602833213, now seen corresponding path program 1 times [2019-10-01 23:57:30,297 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:30,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:30,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,305 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:30,305 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:30,305 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:30,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:30,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:57:30,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 23:57:30,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:30,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:57:30,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:57:30,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:57:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:30,392 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-10-01 23:57:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:30,489 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-01 23:57:30,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:57:30,490 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-01 23:57:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:30,491 INFO L225 Difference]: With dead ends: 79 [2019-10-01 23:57:30,491 INFO L226 Difference]: Without dead ends: 48 [2019-10-01 23:57:30,492 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-01 23:57:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-01 23:57:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-01 23:57:30,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-01 23:57:30,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2019-10-01 23:57:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:30,501 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-01 23:57:30,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:57:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-01 23:57:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-01 23:57:30,502 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:30,502 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:30,503 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:30,503 INFO L82 PathProgramCache]: Analyzing trace with hash 249553947, now seen corresponding path program 2 times [2019-10-01 23:57:30,503 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:30,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:30,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,510 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:30,511 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:30,511 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:30,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:57:30,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-01 23:57:30,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:57:30,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:57:30,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:57:30,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:57:30,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 23:57:30,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 23:57:30,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 23:57:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:30,587 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-01 23:57:30,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:30,657 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2019-10-01 23:57:30,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:57:30,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-01 23:57:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:30,659 INFO L225 Difference]: With dead ends: 89 [2019-10-01 23:57:30,659 INFO L226 Difference]: Without dead ends: 70 [2019-10-01 23:57:30,660 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-01 23:57:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-01 23:57:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2019-10-01 23:57:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-01 23:57:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-01 23:57:30,669 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-10-01 23:57:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:30,670 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-01 23:57:30,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 23:57:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-01 23:57:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-01 23:57:30,671 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:30,671 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:30,672 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1698801625, now seen corresponding path program 1 times [2019-10-01 23:57:30,672 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:30,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:30,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:57:30,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,681 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:30,682 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:30,682 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:30,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:57:30,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:57:30,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:57:30,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:30,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-01 23:57:30,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:57:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:57:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:57:30,785 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-10-01 23:57:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:30,886 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2019-10-01 23:57:30,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:57:30,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-01 23:57:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:30,888 INFO L225 Difference]: With dead ends: 89 [2019-10-01 23:57:30,888 INFO L226 Difference]: Without dead ends: 52 [2019-10-01 23:57:30,889 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:57:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-01 23:57:30,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-01 23:57:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-01 23:57:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2019-10-01 23:57:30,899 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2019-10-01 23:57:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:30,900 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2019-10-01 23:57:30,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:57:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2019-10-01 23:57:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-01 23:57:30,901 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:30,901 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:30,902 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash -602786922, now seen corresponding path program 2 times [2019-10-01 23:57:30,902 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:30,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:57:30,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:30,910 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:30,911 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:30,911 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:30,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:57:30,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:57:30,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:57:30,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 23:57:30,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-01 23:57:31,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:31,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-01 23:57:31,039 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:57:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:57:31,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:57:31,040 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2019-10-01 23:57:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:31,186 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2019-10-01 23:57:31,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:57:31,187 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-01 23:57:31,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:31,188 INFO L225 Difference]: With dead ends: 99 [2019-10-01 23:57:31,188 INFO L226 Difference]: Without dead ends: 57 [2019-10-01 23:57:31,189 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:57:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-01 23:57:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-01 23:57:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-01 23:57:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-01 23:57:31,212 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2019-10-01 23:57:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:31,214 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-01 23:57:31,214 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:57:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-01 23:57:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-01 23:57:31,217 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:31,218 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:31,218 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash -119527047, now seen corresponding path program 3 times [2019-10-01 23:57:31,220 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:31,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:31,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:31,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:57:31,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:31,238 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:31,238 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:31,239 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:31,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:57:31,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-01 23:57:31,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:57:31,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:57:31,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:57:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-01 23:57:31,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-01 23:57:31,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-01 23:57:31,367 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:57:31,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:57:31,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:31,371 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2019-10-01 23:57:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:57:31,454 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-10-01 23:57:31,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:57:31,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-01 23:57:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:57:31,457 INFO L225 Difference]: With dead ends: 165 [2019-10-01 23:57:31,457 INFO L226 Difference]: Without dead ends: 128 [2019-10-01 23:57:31,458 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:57:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-01 23:57:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-10-01 23:57:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-01 23:57:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-10-01 23:57:31,472 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 37 [2019-10-01 23:57:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:57:31,473 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-10-01 23:57:31,473 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:57:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-10-01 23:57:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-01 23:57:31,474 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:57:31,474 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:57:31,474 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:57:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:57:31,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1459343723, now seen corresponding path program 4 times [2019-10-01 23:57:31,475 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:57:31,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:57:31,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:31,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:57:31,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:57:31,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-01 23:57:31,483 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-01 23:57:31,483 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-01 23:57:31,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-02 00:12:08,856 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-02 00:12:08,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-02 00:12:08,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-02 00:12:08,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-02 00:12:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-02 00:12:09,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-02 00:12:09,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-02 00:12:09,013 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-02 00:12:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-02 00:12:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:12:09,013 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 8 states. [2019-10-02 00:12:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 00:12:09,136 INFO L93 Difference]: Finished difference Result 150 states and 187 transitions. [2019-10-02 00:12:09,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 00:12:09,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2019-10-02 00:12:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 00:12:09,138 INFO L225 Difference]: With dead ends: 150 [2019-10-02 00:12:09,138 INFO L226 Difference]: Without dead ends: 84 [2019-10-02 00:12:09,139 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-02 00:12:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-02 00:12:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2019-10-02 00:12:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-02 00:12:09,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2019-10-02 00:12:09,151 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 57 [2019-10-02 00:12:09,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 00:12:09,151 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2019-10-02 00:12:09,152 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-02 00:12:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2019-10-02 00:12:09,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 00:12:09,153 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 00:12:09,153 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 00:12:09,153 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 00:12:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 00:12:09,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1598561597, now seen corresponding path program 5 times [2019-10-02 00:12:09,153 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-02 00:12:09,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-02 00:12:09,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:12:09,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-02 00:12:09,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 00:12:09,161 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-10-02 00:12:09,161 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-10-02 00:12:09,161 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-10-02 00:12:09,180 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true