/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:09:13,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:09:13,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:09:13,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:09:13,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:09:13,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:09:13,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:09:13,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:09:13,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:09:13,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:09:13,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:09:13,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:09:13,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:09:13,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:09:13,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:09:13,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:09:13,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:09:13,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:09:13,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:09:13,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:09:13,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:09:13,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:09:13,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:09:13,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:09:13,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 22:09:13,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 22:09:13,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 22:09:13,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 22:09:13,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 22:09:13,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 22:09:13,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:09:13,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:09:13,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:09:13,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:09:13,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:09:13,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:09:13,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:09:13,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:09:13,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:09:13,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:09:13,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:09:13,265 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 [2019-11-23 22:09:13,291 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:09:13,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:09:13,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:09:13,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:09:13,301 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:09:13,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:09:13,301 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:09:13,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:09:13,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:09:13,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:09:13,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:09:13,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:09:13,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:09:13,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:09:13,303 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:09:13,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:09:13,303 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:09:13,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:09:13,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:09:13,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:09:13,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:09:13,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:09:13,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:09:13,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:09:13,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:09:13,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:09:13,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:09:13,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:09:13,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:09:13,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:09:13,572 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:09:13,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:09:13,585 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:09:13,586 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:09:13,587 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:09:13,588 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2019-11-23 22:09:13,645 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5751df0cb/f9c77317bd134beb81eb85eba8a7f664/FLAG283af9dba [2019-11-23 22:09:14,064 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:09:14,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_vardep_2.c [2019-11-23 22:09:14,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5751df0cb/f9c77317bd134beb81eb85eba8a7f664/FLAG283af9dba [2019-11-23 22:09:14,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5751df0cb/f9c77317bd134beb81eb85eba8a7f664 [2019-11-23 22:09:14,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:09:14,489 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:09:14,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:09:14,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:09:14,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:09:14,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225b5edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14, skipping insertion in model container [2019-11-23 22:09:14,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:09:14,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:09:14,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:09:14,710 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:09:14,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:09:14,732 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:09:14,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14 WrapperNode [2019-11-23 22:09:14,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:09:14,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:09:14,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:09:14,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:09:14,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:09:14,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:09:14,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:09:14,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:09:14,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (1/1) ... [2019-11-23 22:09:14,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:09:14,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:09:14,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:09:14,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:09:14,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (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 [2019-11-23 22:09:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:09:14,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:09:15,054 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:09:15,055 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:09:15,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:09:15 BoogieIcfgContainer [2019-11-23 22:09:15,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:09:15,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:09:15,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:09:15,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:09:15,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:09:14" (1/3) ... [2019-11-23 22:09:15,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e766316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:09:15, skipping insertion in model container [2019-11-23 22:09:15,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:09:14" (2/3) ... [2019-11-23 22:09:15,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e766316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:09:15, skipping insertion in model container [2019-11-23 22:09:15,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:09:15" (3/3) ... [2019-11-23 22:09:15,063 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_vardep_2.c [2019-11-23 22:09:15,069 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:09:15,074 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:09:15,085 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:09:15,108 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:09:15,108 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:09:15,108 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:09:15,108 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:09:15,108 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:09:15,108 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:09:15,109 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:09:15,109 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:09:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-11-23 22:09:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 22:09:15,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:15,125 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 22:09:15,125 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:15,130 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-23 22:09:15,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:15,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139186019] [2019-11-23 22:09:15,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:15,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139186019] [2019-11-23 22:09:15,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:09:15,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:09:15,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937264421] [2019-11-23 22:09:15,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:09:15,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:09:15,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:09:15,494 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 4 states. [2019-11-23 22:09:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:15,630 INFO L93 Difference]: Finished difference Result 17 states and 24 transitions. [2019-11-23 22:09:15,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:09:15,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 22:09:15,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:15,642 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:09:15,642 INFO L226 Difference]: Without dead ends: 7 [2019-11-23 22:09:15,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:09:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-23 22:09:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-23 22:09:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-23 22:09:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-23 22:09:15,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-11-23 22:09:15,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:15,681 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-23 22:09:15,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:09:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-23 22:09:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:09:15,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:15,683 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-11-23 22:09:15,685 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash 925914308, now seen corresponding path program 1 times [2019-11-23 22:09:15,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:15,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760701967] [2019-11-23 22:09:15,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:20,075 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2019-11-23 22:09:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:20,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760701967] [2019-11-23 22:09:20,093 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702610625] [2019-11-23 22:09:20,094 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 [2019-11-23 22:09:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:20,157 WARN L253 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:09:20,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:20,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:09:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:20,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:20,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:09:20,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186843255] [2019-11-23 22:09:20,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:09:20,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:20,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:09:20,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:09:20,276 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2019-11-23 22:09:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:20,418 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-23 22:09:20,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:09:20,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2019-11-23 22:09:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:20,419 INFO L225 Difference]: With dead ends: 12 [2019-11-23 22:09:20,419 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:09:20,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:09:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:09:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-23 22:09:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:09:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:09:20,424 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-23 22:09:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:20,425 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:09:20,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:09:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:09:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:09:20,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:20,426 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-11-23 22:09:20,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:20,630 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash 745564284, now seen corresponding path program 2 times [2019-11-23 22:09:20,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:20,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210677753] [2019-11-23 22:09:20,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:21,204 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2019-11-23 22:09:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:21,402 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210677753] [2019-11-23 22:09:21,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262429606] [2019-11-23 22:09:21,403 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 22:09:21,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:09:21,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:09:21,443 WARN L253 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:09:21,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:09:21,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:09:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:21,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:09:21,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 22:09:21,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39764509] [2019-11-23 22:09:21,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:09:21,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:09:21,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:09:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:09:21,777 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 10 states. [2019-11-23 22:09:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:09:21,995 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-23 22:09:21,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:09:21,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2019-11-23 22:09:21,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:09:21,996 INFO L225 Difference]: With dead ends: 14 [2019-11-23 22:09:21,996 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 22:09:21,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:09:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 22:09:22,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-23 22:09:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:09:22,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:09:22,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-23 22:09:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:09:22,001 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:09:22,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:09:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:09:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:09:22,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:09:22,003 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2019-11-23 22:09:22,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:09:22,213 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:09:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:09:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash -772116940, now seen corresponding path program 3 times [2019-11-23 22:09:22,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:09:22,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706059000] [2019-11-23 22:09:22,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:09:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:09:25,634 WARN L192 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2019-11-23 22:09:25,885 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 33 [2019-11-23 22:09:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:09:26,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706059000] [2019-11-23 22:09:26,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384231799] [2019-11-23 22:09:26,065 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