/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 DAGSIZE --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-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:50:06,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:50:06,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:50:06,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:50:06,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:50:06,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:50:06,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:50:06,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:50:06,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:50:06,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:50:06,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:50:06,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:50:06,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:50:06,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:50:06,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:50:06,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:50:06,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:50:06,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:50:06,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:50:06,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:50:06,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:50:06,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:50:06,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:50:06,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:50:06,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:50:06,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:50:06,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:50:06,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:50:06,305 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 20:50:06,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:50:06,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:50:06,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:50:06,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:50:06,348 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:50:06,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:50:06,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:50:06,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:50:06,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:50:06,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:50:06,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:50:06,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:50:06,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:50:06,352 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:50:06,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:50:06,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:50:06,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:50:06,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:50:06,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:50:06,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:50:06,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:50:06,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:50:06,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:50:06,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:50:06,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:50:06,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:50:06,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:06,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:50:06,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:50:06,356 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 -> DAGSIZE 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 20:50:06,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:50:06,771 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:50:06,775 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:50:06,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:50:06,777 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:50:06,778 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-21 20:50:06,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f76bef3a/5ffb9bb14e7442dabb114eb551a67174/FLAGd98b4a28b [2020-07-21 20:50:07,411 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:50:07,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-21 20:50:07,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f76bef3a/5ffb9bb14e7442dabb114eb551a67174/FLAGd98b4a28b [2020-07-21 20:50:07,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f76bef3a/5ffb9bb14e7442dabb114eb551a67174 [2020-07-21 20:50:07,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:50:07,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:50:07,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:50:07,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:50:07,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:50:07,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:07" (1/1) ... [2020-07-21 20:50:07,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21521c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:07, skipping insertion in model container [2020-07-21 20:50:07,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:07" (1/1) ... [2020-07-21 20:50:07,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:50:07,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:50:08,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:50:08,014 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:50:08,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:50:08,048 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:50:08,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08 WrapperNode [2020-07-21 20:50:08,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:50:08,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:50:08,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:50:08,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:50:08,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (1/1) ... [2020-07-21 20:50:08,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:50:08,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:50:08,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:50:08,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:50:08,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (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 20:50:08,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:50:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:50:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:50:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:50:08,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:50:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:50:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:50:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:50:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:50:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:50:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:50:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:50:08,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:50:08,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:50:08,583 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:50:08,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:08 BoogieIcfgContainer [2020-07-21 20:50:08,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:50:08,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:50:08,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:50:08,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:50:08,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:07" (1/3) ... [2020-07-21 20:50:08,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61810b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:08, skipping insertion in model container [2020-07-21 20:50:08,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:08" (2/3) ... [2020-07-21 20:50:08,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61810b5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:08, skipping insertion in model container [2020-07-21 20:50:08,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:08" (3/3) ... [2020-07-21 20:50:08,608 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-07-21 20:50:08,622 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:50:08,631 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:50:08,648 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:50:08,678 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:50:08,678 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:50:08,678 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:50:08,679 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:50:08,679 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:50:08,679 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:50:08,679 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:50:08,679 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:50:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 20:50:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 20:50:08,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:08,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:08,712 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:08,721 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-07-21 20:50:08,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:08,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905981907] [2020-07-21 20:50:08,734 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 20:50:08,821 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:08,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:08,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 20:50:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:08,982 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 20:50:08,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:50:08,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905981907] [2020-07-21 20:50:08,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:50:08,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:50:08,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421001400] [2020-07-21 20:50:08,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:50:08,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:50:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:50:09,018 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 20:50:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:09,173 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2020-07-21 20:50:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:50:09,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 20:50:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:09,193 INFO L225 Difference]: With dead ends: 51 [2020-07-21 20:50:09,194 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 20:50:09,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 20:50:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 20:50:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 20:50:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 20:50:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-07-21 20:50:09,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2020-07-21 20:50:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:09,277 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-07-21 20:50:09,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:50:09,278 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-21 20:50:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:50:09,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:09,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:09,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:09,498 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-07-21 20:50:09,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:09,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940514974] [2020-07-21 20:50:09,501 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 20:50:09,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:09,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 20:50:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:09,799 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 20:50:09,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:50:09,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:50:10,176 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 20:50:10,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940514974] [2020-07-21 20:50:10,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:50:10,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 20:50:10,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477486046] [2020-07-21 20:50:10,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 20:50:10,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 20:50:10,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:50:10,183 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 14 states. [2020-07-21 20:50:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:18,876 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-07-21 20:50:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:50:18,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-21 20:50:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:18,878 INFO L225 Difference]: With dead ends: 40 [2020-07-21 20:50:18,879 INFO L226 Difference]: Without dead ends: 26 [2020-07-21 20:50:18,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-21 20:50:18,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-21 20:50:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-21 20:50:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 20:50:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-21 20:50:18,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-07-21 20:50:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:18,890 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-21 20:50:18,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 20:50:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-21 20:50:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 20:50:18,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:18,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:19,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:19,095 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 1 times [2020-07-21 20:50:19,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:19,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396194915] [2020-07-21 20:50:19,097 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 20:50:19,189 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:19,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:50:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:19,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:50:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:19,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396194915] [2020-07-21 20:50:19,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:50:19,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 20:50:19,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091755382] [2020-07-21 20:50:19,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:50:19,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:19,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:50:19,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:50:19,304 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-07-21 20:50:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:19,612 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-07-21 20:50:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:50:19,613 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-21 20:50:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:19,616 INFO L225 Difference]: With dead ends: 60 [2020-07-21 20:50:19,616 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 20:50:19,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:50:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 20:50:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-07-21 20:50:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 20:50:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-07-21 20:50:19,629 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 23 [2020-07-21 20:50:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:19,630 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-07-21 20:50:19,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:50:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-07-21 20:50:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 20:50:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:19,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:19,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:19,837 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-07-21 20:50:19,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:19,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892908107] [2020-07-21 20:50:19,840 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 20:50:19,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:19,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 20:50:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:20,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:50:20,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:50:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 8 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 20:50:26,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892908107] [2020-07-21 20:50:26,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:50:26,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2020-07-21 20:50:26,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801060642] [2020-07-21 20:50:26,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 20:50:26,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:26,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 20:50:26,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=165, Unknown=3, NotChecked=0, Total=210 [2020-07-21 20:50:26,852 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 15 states. [2020-07-21 20:50:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:56,165 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2020-07-21 20:50:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 20:50:56,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-07-21 20:50:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:56,168 INFO L225 Difference]: With dead ends: 91 [2020-07-21 20:50:56,169 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 20:50:56,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=46, Invalid=191, Unknown=3, NotChecked=0, Total=240 [2020-07-21 20:50:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 20:50:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-07-21 20:50:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 20:50:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2020-07-21 20:50:56,181 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 25 [2020-07-21 20:50:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:56,181 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2020-07-21 20:50:56,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 20:50:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2020-07-21 20:50:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 20:50:56,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:56,183 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:56,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:56,386 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1723350151, now seen corresponding path program 1 times [2020-07-21 20:50:56,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:56,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934638717] [2020-07-21 20:50:56,388 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:56,483 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:50:56,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:56,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:50:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 20:50:56,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934638717] [2020-07-21 20:50:56,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:50:56,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-21 20:50:56,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900599570] [2020-07-21 20:50:56,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 20:50:56,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 20:50:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 20:50:56,600 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand 11 states. [2020-07-21 20:51:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:51:05,180 INFO L93 Difference]: Finished difference Result 139 states and 192 transitions. [2020-07-21 20:51:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:51:05,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-07-21 20:51:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:51:05,182 INFO L225 Difference]: With dead ends: 139 [2020-07-21 20:51:05,182 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 20:51:05,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 20:51:05,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 20:51:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-07-21 20:51:05,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-21 20:51:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2020-07-21 20:51:05,196 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 33 [2020-07-21 20:51:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:51:05,196 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2020-07-21 20:51:05,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 20:51:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2020-07-21 20:51:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 20:51:05,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:51:05,198 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:51:05,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:51:05,399 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:51:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:51:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1882350357, now seen corresponding path program 2 times [2020-07-21 20:51:05,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:51:05,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296953993] [2020-07-21 20:51:05,401 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:51:05,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:51:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:51:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 20:51:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:51:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:51:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:51:05,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:51:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:51:45,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296953993] [2020-07-21 20:51:45,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:51:45,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2020-07-21 20:51:45,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312491445] [2020-07-21 20:51:45,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 20:51:45,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:51:45,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 20:51:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=918, Unknown=16, NotChecked=0, Total=1122 [2020-07-21 20:51:45,292 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand 34 states. [2020-07-21 20:52:35,973 WARN L193 SmtUtils]: Spent 43.54 s on a formula simplification. DAG size of input: 115 DAG size of output: 45 [2020-07-21 20:53:42,801 WARN L193 SmtUtils]: Spent 1.05 m on a formula simplification. DAG size of input: 123 DAG size of output: 13 [2020-07-21 20:54:20,245 WARN L193 SmtUtils]: Spent 32.20 s on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-21 20:55:56,274 WARN L193 SmtUtils]: Spent 1.35 m on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-07-21 20:56:52,617 WARN L193 SmtUtils]: Spent 33.47 s on a formula simplification. DAG size of input: 101 DAG size of output: 37 [2020-07-21 20:57:14,630 WARN L193 SmtUtils]: Spent 9.77 s on a formula simplification. DAG size of input: 108 DAG size of output: 13 [2020-07-21 20:57:56,683 WARN L193 SmtUtils]: Spent 28.57 s on a formula simplification. DAG size of input: 87 DAG size of output: 38 [2020-07-21 20:59:00,858 WARN L193 SmtUtils]: Spent 35.12 s on a formula simplification. DAG size of input: 66 DAG size of output: 14 [2020-07-21 20:59:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:59:18,780 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2020-07-21 20:59:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 20:59:18,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-07-21 20:59:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:59:18,783 INFO L225 Difference]: With dead ends: 143 [2020-07-21 20:59:18,783 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:59:18,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 464.3s TimeCoverageRelationStatistics Valid=331, Invalid=1439, Unknown=36, NotChecked=0, Total=1806 [2020-07-21 20:59:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:59:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:59:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:59:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:59:18,786 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-07-21 20:59:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:59:18,786 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:59:18,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 20:59:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:59:18,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:59:18,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:59:18,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:59:19,132 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 128 [2020-07-21 21:00:19,749 WARN L193 SmtUtils]: Spent 1.01 m on a formula simplification. DAG size of input: 128 DAG size of output: 13 [2020-07-21 21:00:36,212 WARN L193 SmtUtils]: Spent 16.45 s on a formula simplification. DAG size of input: 61 DAG size of output: 11 [2020-07-21 21:00:36,216 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 21:00:36,217 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 21:00:36,217 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 21:00:36,217 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 21:00:36,217 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 21:00:36,217 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 21:00:36,217 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 21:00:36,217 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-07-21 21:00:36,218 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (= (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0 5) 4294967296) (mod (+ main_~l~0 5) 4294967296)) [2020-07-21 21:00:36,219 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (= (mod main_~l~0 4294967296) (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0) 4294967296)) [2020-07-21 21:00:36,219 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-07-21 21:00:36,219 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-07-21 21:00:36,219 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 21:00:36,219 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 21:00:36,219 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 21:00:36,219 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 21:00:36,219 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 21:00:36,219 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 21:00:36,220 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 21:00:36,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 09:00:36 BoogieIcfgContainer [2020-07-21 21:00:36,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 21:00:36,238 INFO L168 Benchmark]: Toolchain (without parser) took 628475.87 ms. Allocated memory was 144.7 MB in the beginning and 272.6 MB in the end (delta: 127.9 MB). Free memory was 101.1 MB in the beginning and 171.0 MB in the end (delta: -69.9 MB). Peak memory consumption was 58.0 MB. Max. memory is 7.1 GB. [2020-07-21 21:00:36,240 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 21:00:36,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.94 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 21:00:36,242 INFO L168 Benchmark]: Boogie Preprocessor took 37.17 ms. Allocated memory is still 144.7 MB. Free memory was 91.0 MB in the beginning and 89.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-07-21 21:00:36,248 INFO L168 Benchmark]: RCFGBuilder took 500.68 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 89.4 MB in the beginning and 167.2 MB in the end (delta: -77.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 21:00:36,250 INFO L168 Benchmark]: TraceAbstraction took 627645.33 ms. Allocated memory was 201.9 MB in the beginning and 272.6 MB in the end (delta: 70.8 MB). Free memory was 166.6 MB in the beginning and 171.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-07-21 21:00:36,259 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 144.7 MB. Free memory was 119.7 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.94 ms. Allocated memory is still 144.7 MB. Free memory was 100.7 MB in the beginning and 91.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 37.17 ms. Allocated memory is still 144.7 MB. Free memory was 91.0 MB in the beginning and 89.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 500.68 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 89.4 MB in the beginning and 167.2 MB in the end (delta: -77.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 627645.33 ms. Allocated memory was 201.9 MB in the beginning and 272.6 MB in the end (delta: 70.8 MB). Free memory was 166.6 MB in the beginning and 171.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (v4 + i + j + k + 5) % 4294967296 == (l + 5) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 550.3s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 500.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 77.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 138 SDslu, 481 SDs, 0 SdLazy, 1129 SolverSat, 107 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 73.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 186 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 472.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=5, 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, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 48 NumberOfFragments, 30 HoareAnnotationTreeSize, 18 FomulaSimplifications, 969 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 488 FormulaSimplificationTreeSizeReductionInter, 77.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 47.7s InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 265 ConstructedInterpolants, 24 QuantifiedInterpolants, 72893 SizeOfPredicates, 14 NumberOfNonLiveVariables, 374 ConjunctsInSsa, 114 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 42/254 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...