/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:16:45,089 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 22:16:45,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:16:45,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:16:45,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:16:45,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:16:45,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:16:45,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:16:45,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:16:45,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:16:45,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:16:45,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:16:45,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:16:45,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:16:45,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:16:45,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:16:45,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:16:45,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:16:45,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:16:45,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:16:45,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:16:45,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:16:45,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:16:45,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:16:45,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:16:45,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:16:45,211 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 [2020-07-20 22:16:45,259 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:16:45,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:16:45,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:16:45,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:16:45,271 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:16:45,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:16:45,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:16:45,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:16:45,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:16:45,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:16:45,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:16:45,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:16:45,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:16:45,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:16:45,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:16:45,276 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:16:45,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:16:45,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:16:45,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:16:45,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:16:45,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:16:45,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:16:45,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:16:45,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:16:45,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:16:45,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:16:45,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:45,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:16:45,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:16:45,280 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 -> 4 [2020-07-20 22:16:45,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:16:45,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:16:45,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:16:45,668 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:16:45,668 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:16:45,669 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-07-20 22:16:45,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8393e755c/32b502bd4dd740d5b7c667de7d824360/FLAGc2c65d98d [2020-07-20 22:16:46,333 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:16:46,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-07-20 22:16:46,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8393e755c/32b502bd4dd740d5b7c667de7d824360/FLAGc2c65d98d [2020-07-20 22:16:46,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8393e755c/32b502bd4dd740d5b7c667de7d824360 [2020-07-20 22:16:46,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:16:46,664 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:16:46,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:46,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:16:46,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:16:46,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:46" (1/1) ... [2020-07-20 22:16:46,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e44e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:46, skipping insertion in model container [2020-07-20 22:16:46,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:16:46" (1/1) ... [2020-07-20 22:16:46,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:16:46,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:16:46,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:46,997 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:16:47,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:16:47,031 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:16:47,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47 WrapperNode [2020-07-20 22:16:47,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:16:47,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:16:47,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:16:47,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:16:47,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (1/1) ... [2020-07-20 22:16:47,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:16:47,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:16:47,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:16:47,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:16:47,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (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 [2020-07-20 22:16:47,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:16:47,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:16:47,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:16:47,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:16:47,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:16:47,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:16:47,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:16:47,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:16:47,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:16:47,467 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:16:47,469 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:16:47,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:47 BoogieIcfgContainer [2020-07-20 22:16:47,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:16:47,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:16:47,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:16:47,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:16:47,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:16:46" (1/3) ... [2020-07-20 22:16:47,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343a57b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:47, skipping insertion in model container [2020-07-20 22:16:47,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:16:47" (2/3) ... [2020-07-20 22:16:47,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@343a57b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:16:47, skipping insertion in model container [2020-07-20 22:16:47,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:16:47" (3/3) ... [2020-07-20 22:16:47,492 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-07-20 22:16:47,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:16:47,524 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:16:47,544 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:16:47,577 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:16:47,578 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:16:47,578 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:16:47,578 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:16:47,578 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:16:47,579 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:16:47,579 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:16:47,579 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:16:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 22:16:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:16:47,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:47,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:47,613 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-07-20 22:16:47,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:47,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637271600] [2020-07-20 22:16:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:16:47,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:47,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:16:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:47,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:16:47,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637271600] [2020-07-20 22:16:47,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:16:47,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:16:47,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017127235] [2020-07-20 22:16:47,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:16:47,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:47,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:16:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:16:47,947 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-20 22:16:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:48,081 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 22:16:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:16:48,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:16:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:48,092 INFO L225 Difference]: With dead ends: 40 [2020-07-20 22:16:48,093 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 22:16:48,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 22:16:48,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 22:16:48,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 22:16:48,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-20 22:16:48,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-07-20 22:16:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:48,140 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-20 22:16:48,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:16:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-20 22:16:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:16:48,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:48,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:48,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:48,345 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-07-20 22:16:48,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:48,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277182943] [2020-07-20 22:16:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:16:48,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:48,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:16:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:48,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:48,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277182943] [2020-07-20 22:16:48,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:48,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 22:16:48,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151155350] [2020-07-20 22:16:48,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:16:48,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:16:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:48,503 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-07-20 22:16:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:48,602 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2020-07-20 22:16:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:16:48,603 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-20 22:16:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:48,605 INFO L225 Difference]: With dead ends: 34 [2020-07-20 22:16:48,605 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 22:16:48,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:16:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 22:16:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 22:16:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 22:16:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-20 22:16:48,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2020-07-20 22:16:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:48,617 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-20 22:16:48,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:16:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-20 22:16:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:16:48,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:48,619 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:48,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:48,834 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash -845939081, now seen corresponding path program 1 times [2020-07-20 22:16:48,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:48,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456024817] [2020-07-20 22:16:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:16:48,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:48,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:48,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 22:16:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:16:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:16:48,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456024817] [2020-07-20 22:16:48,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:48,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-20 22:16:48,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868344801] [2020-07-20 22:16:48,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:16:48,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:16:48,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:16:48,969 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-07-20 22:16:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:49,019 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-07-20 22:16:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:16:49,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-07-20 22:16:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:49,021 INFO L225 Difference]: With dead ends: 33 [2020-07-20 22:16:49,022 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 22:16:49,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:16:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 22:16:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 22:16:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 22:16:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-20 22:16:49,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 22 [2020-07-20 22:16:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:49,032 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-20 22:16:49,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:16:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-20 22:16:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:16:49,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:49,033 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:49,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:49,247 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 2 times [2020-07-20 22:16:49,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:49,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867724000] [2020-07-20 22:16:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:16:49,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:16:49,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:16:49,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:16:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:16:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:49,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:16:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:16:49,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867724000] [2020-07-20 22:16:49,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:16:49,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 22:16:49,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638896719] [2020-07-20 22:16:49,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:16:49,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:16:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:16:49,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:16:49,446 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2020-07-20 22:16:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:16:49,608 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-07-20 22:16:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:16:49,609 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-07-20 22:16:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:16:49,613 INFO L225 Difference]: With dead ends: 40 [2020-07-20 22:16:49,614 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:16:49,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:16:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:16:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 22:16:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 22:16:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-20 22:16:49,626 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 22 [2020-07-20 22:16:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:16:49,627 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-20 22:16:49,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:16:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-20 22:16:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 22:16:49,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:16:49,629 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:16:49,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:49,844 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:16:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:16:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 3 times [2020-07-20 22:16:49,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:16:49,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020811156] [2020-07-20 22:16:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 22:16:49,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:16:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 22:16:49,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:16:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 22:16:49,915 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 22:16:49,958 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 22:16:49,963 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 22:16:50,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:16:50,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:16:50 BoogieIcfgContainer [2020-07-20 22:16:50,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:16:50,214 INFO L168 Benchmark]: Toolchain (without parser) took 3552.12 ms. Allocated memory was 145.2 MB in the beginning and 234.9 MB in the end (delta: 89.7 MB). Free memory was 103.6 MB in the beginning and 192.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:50,215 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 22:16:50,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.22 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:50,218 INFO L168 Benchmark]: Boogie Preprocessor took 32.50 ms. Allocated memory is still 145.2 MB. Free memory was 93.8 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:50,219 INFO L168 Benchmark]: RCFGBuilder took 410.29 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.2 MB in the beginning and 169.9 MB in the end (delta: -77.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:50,219 INFO L168 Benchmark]: TraceAbstraction took 2733.42 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 169.3 MB in the beginning and 192.0 MB in the end (delta: -22.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:16:50,224 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 367.22 ms. Allocated memory is still 145.2 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.50 ms. Allocated memory is still 145.2 MB. Free memory was 93.8 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.29 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 92.2 MB in the beginning and 169.9 MB in the end (delta: -77.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2733.42 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 169.3 MB in the beginning and 192.0 MB in the end (delta: -22.8 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 5, TraceHistogramMax: 8, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 48 SDtfs, 49 SDslu, 105 SDs, 0 SdLazy, 79 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=4, 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 101 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 4161 SizeOfPredicates, 5 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 30/90 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 incorrect! Received shutdown request...