/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:44:05,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:44:05,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:44:05,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:44:05,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:44:05,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:44:05,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:44:05,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:44:05,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:44:05,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:44:05,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:44:05,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:44:05,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:44:05,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:44:05,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:44:05,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:44:05,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:44:05,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:44:05,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:44:05,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:44:05,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:44:05,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:44:05,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:44:05,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:44:05,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:44:05,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:44:05,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:44:05,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:44:05,310 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 [2020-07-21 16:44:05,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:44:05,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:44:05,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:44:05,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:44:05,329 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:44:05,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:44:05,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:44:05,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:44:05,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:44:05,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:44:05,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:44:05,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:44:05,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:44:05,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:44:05,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:44:05,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:44:05,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:44:05,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:44:05,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:44:05,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:44:05,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:44:05,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:05,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:44:05,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:44:05,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:44:05,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:44:05,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:05,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:44:05,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:44:05,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:44:05,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:44:05,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:44:05,669 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:44:05,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:44:05,675 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:44:05,676 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2020-07-21 16:44:05,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f31689c36/21e6ec4291a949fd9cc21fe0c24cc9d2/FLAG2d3621749 [2020-07-21 16:44:06,371 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:44:06,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2020-07-21 16:44:06,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f31689c36/21e6ec4291a949fd9cc21fe0c24cc9d2/FLAG2d3621749 [2020-07-21 16:44:06,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f31689c36/21e6ec4291a949fd9cc21fe0c24cc9d2 [2020-07-21 16:44:06,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:44:06,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:44:06,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:06,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:44:06,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:44:06,799 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:06" (1/1) ... [2020-07-21 16:44:06,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656f4b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:06, skipping insertion in model container [2020-07-21 16:44:06,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:06" (1/1) ... [2020-07-21 16:44:06,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:44:06,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:44:07,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:07,037 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:44:07,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:07,077 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:44:07,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07 WrapperNode [2020-07-21 16:44:07,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:07,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:44:07,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:44:07,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:44:07,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (1/1) ... [2020-07-21 16:44:07,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:44:07,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:44:07,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:44:07,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:44:07,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (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 [2020-07-21 16:44:07,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:44:07,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:44:07,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:44:07,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:44:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:44:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:44:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:44:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:44:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:44:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:44:07,490 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:44:07,490 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:44:07,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:07 BoogieIcfgContainer [2020-07-21 16:44:07,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:44:07,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:44:07,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:44:07,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:44:07,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:06" (1/3) ... [2020-07-21 16:44:07,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da4cef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:07, skipping insertion in model container [2020-07-21 16:44:07,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:07" (2/3) ... [2020-07-21 16:44:07,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7da4cef1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:07, skipping insertion in model container [2020-07-21 16:44:07,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:07" (3/3) ... [2020-07-21 16:44:07,509 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2020-07-21 16:44:07,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:44:07,532 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:44:07,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:44:07,581 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:44:07,582 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:44:07,582 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:44:07,582 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:44:07,583 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:44:07,583 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:44:07,583 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:44:07,583 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:44:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 16:44:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:44:07,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:07,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:07,632 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash 579653156, now seen corresponding path program 1 times [2020-07-21 16:44:07,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:07,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38950425] [2020-07-21 16:44:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:07,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:44:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:07,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:07,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38950425] [2020-07-21 16:44:07,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:07,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:44:07,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134073457] [2020-07-21 16:44:07,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:44:07,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:44:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:44:07,824 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-21 16:44:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:07,851 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-07-21 16:44:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:44:07,853 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 16:44:07,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:07,864 INFO L225 Difference]: With dead ends: 30 [2020-07-21 16:44:07,864 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 16:44:07,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:44:07,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 16:44:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 16:44:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 16:44:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 16:44:07,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-21 16:44:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:07,909 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 16:44:07,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:44:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 16:44:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:44:07,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:07,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:08,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:08,124 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash 574112030, now seen corresponding path program 1 times [2020-07-21 16:44:08,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:08,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304013462] [2020-07-21 16:44:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:08,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:08,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:08,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:44:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:08,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:08,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304013462] [2020-07-21 16:44:08,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:08,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:44:08,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698905143] [2020-07-21 16:44:08,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:44:08,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:44:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:44:08,278 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-07-21 16:44:08,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:08,374 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-21 16:44:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:44:08,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 16:44:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:08,379 INFO L225 Difference]: With dead ends: 19 [2020-07-21 16:44:08,379 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 16:44:08,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 16:44:08,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 16:44:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 16:44:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 16:44:08,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-07-21 16:44:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:08,397 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 16:44:08,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:44:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 16:44:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:44:08,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:08,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:08,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:08,615 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1164206820, now seen corresponding path program 1 times [2020-07-21 16:44:08,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:08,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436053166] [2020-07-21 16:44:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:08,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:44:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:08,759 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:44:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:08,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:08,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:09,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436053166] [2020-07-21 16:44:09,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:09,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 16:44:09,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111317971] [2020-07-21 16:44:09,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:44:09,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:44:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:44:09,059 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2020-07-21 16:44:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:09,300 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-07-21 16:44:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:44:09,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2020-07-21 16:44:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:09,302 INFO L225 Difference]: With dead ends: 24 [2020-07-21 16:44:09,302 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 16:44:09,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:44:09,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 16:44:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 16:44:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 16:44:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-21 16:44:09,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2020-07-21 16:44:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:09,311 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-21 16:44:09,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:44:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-21 16:44:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:44:09,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:09,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:09,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:09,526 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2033115496, now seen corresponding path program 2 times [2020-07-21 16:44:09,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:09,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292690720] [2020-07-21 16:44:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:09,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:44:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:09,701 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:44:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:09,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:09,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:10,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292690720] [2020-07-21 16:44:10,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:10,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 16:44:10,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943375204] [2020-07-21 16:44:10,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:44:10,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:44:10,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:44:10,195 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 22 states. [2020-07-21 16:44:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:10,982 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-21 16:44:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 16:44:10,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 17 [2020-07-21 16:44:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:10,983 INFO L225 Difference]: With dead ends: 21 [2020-07-21 16:44:10,983 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:44:10,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2020-07-21 16:44:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:44:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:44:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:44:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:44:10,986 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 16:44:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:10,986 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:44:10,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:44:10,987 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:44:10,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:44:11,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:11,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:44:11,395 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:44:11,395 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:44:11,396 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:44:11,396 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:44:11,396 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:44:11,396 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:44:11,396 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-21 16:44:11,396 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-21 16:44:11,397 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-21 16:44:11,397 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 18) no Hoare annotation was computed. [2020-07-21 16:44:11,397 INFO L268 CegarLoopResult]: For program point L14-2(lines 14 16) no Hoare annotation was computed. [2020-07-21 16:44:11,397 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 16) the Hoare annotation is: (or (and (= 1 main_~i~0) (= 0 main_~sn~0)) (and (or (<= main_~i~0 main_~n~0) (= (* main_~n~0 2) main_~sn~0)) (< main_~i~0 (+ (div (+ main_~sn~0 2) 2) 1)) (< (div (+ main_~sn~0 5) 2) (+ main_~i~0 2)))) [2020-07-21 16:44:11,397 INFO L264 CegarLoopResult]: At program point L14-4(lines 14 16) the Hoare annotation is: (or (= (* main_~n~0 2) main_~sn~0) (= 0 main_~sn~0)) [2020-07-21 16:44:11,397 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2020-07-21 16:44:11,398 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-21 16:44:11,398 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-21 16:44:11,398 INFO L268 CegarLoopResult]: For program point L5(lines 5 7) no Hoare annotation was computed. [2020-07-21 16:44:11,398 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2020-07-21 16:44:11,398 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2020-07-21 16:44:11,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:44:11 BoogieIcfgContainer [2020-07-21 16:44:11,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:44:11,421 INFO L168 Benchmark]: Toolchain (without parser) took 4629.69 ms. Allocated memory was 145.2 MB in the beginning and 245.9 MB in the end (delta: 100.7 MB). Free memory was 101.9 MB in the beginning and 175.2 MB in the end (delta: -73.3 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:11,422 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 145.2 MB. Free memory is still 119.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 16:44:11,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.81 ms. Allocated memory is still 145.2 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:11,425 INFO L168 Benchmark]: Boogie Preprocessor took 140.11 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.2 MB in the beginning and 181.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:11,426 INFO L168 Benchmark]: RCFGBuilder took 276.86 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:11,427 INFO L168 Benchmark]: TraceAbstraction took 3920.83 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 169.2 MB in the beginning and 175.2 MB in the end (delta: -6.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:11,431 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 145.2 MB. Free memory is still 119.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.81 ms. Allocated memory is still 145.2 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.11 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.2 MB in the beginning and 181.3 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.86 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.2 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3920.83 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 169.2 MB in the beginning and 175.2 MB in the end (delta: -6.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (1 == i && 0 == sn) || (((i <= n || n * 2 == sn) && i < (sn + 2) / 2 + 1) && (sn + 5) / 2 < i + 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 20 SDslu, 155 SDs, 0 SdLazy, 183 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 21 NumberOfFragments, 50 HoareAnnotationTreeSize, 12 FomulaSimplifications, 40 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 133 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 6728 SizeOfPredicates, 10 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...