/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:30:47,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:30:47,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:30:47,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:30:47,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:30:47,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:30:47,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:30:47,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:30:47,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:30:47,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:30:47,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:30:47,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:30:47,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:30:47,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:30:47,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:30:47,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:30:47,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:30:47,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:30:47,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:30:47,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:30:47,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:30:47,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:30:47,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:30:47,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:30:47,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:30:47,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:30:47,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:30:47,251 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:30:47,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:30:47,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:30:47,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:30:47,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:30:47,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:30:47,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:30:47,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:30:47,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:30:47,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:30:47,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:30:47,332 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:30:47,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:30:47,332 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:30:47,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:30:47,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:30:47,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:30:47,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:30:47,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:30:47,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:30:47,334 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:30:47,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:30:47,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:30:47,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:30:47,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:30:47,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:30:47,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:30:47,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:30:47,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:30:47,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:30:47,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:30:47,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:30:47,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:30:47,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:30:47,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:30:47,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:30:47,339 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-21 10:30:47,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:30:47,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:30:47,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:30:47,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:30:47,824 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:30:47,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-09-21 10:30:47,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d87beccf1/81658094dbfd4bc28e9988744c831539/FLAGc06ce7d53 [2020-09-21 10:30:48,441 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:30:48,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-09-21 10:30:48,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d87beccf1/81658094dbfd4bc28e9988744c831539/FLAGc06ce7d53 [2020-09-21 10:30:48,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d87beccf1/81658094dbfd4bc28e9988744c831539 [2020-09-21 10:30:48,904 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:30:48,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:30:48,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:48,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:30:48,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:30:48,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:48" (1/1) ... [2020-09-21 10:30:48,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a48022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:48, skipping insertion in model container [2020-09-21 10:30:48,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:30:48" (1/1) ... [2020-09-21 10:30:48,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:30:48,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:30:49,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:49,285 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:30:49,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:30:49,338 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:30:49,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49 WrapperNode [2020-09-21 10:30:49,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:30:49,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:30:49,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:30:49,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:30:49,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... [2020-09-21 10:30:49,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:30:49,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:30:49,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:30:49,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:30:49,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-21 10:30:49,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:30:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:30:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:30:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:30:49,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:30:49,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:30:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:30:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:30:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:30:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:30:49,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:30:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:30:49,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:30:49,825 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:30:49,825 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:30:49,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:49 BoogieIcfgContainer [2020-09-21 10:30:49,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:30:49,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:30:49,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:30:49,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:30:49,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:30:48" (1/3) ... [2020-09-21 10:30:49,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109e1536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:49, skipping insertion in model container [2020-09-21 10:30:49,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:30:49" (2/3) ... [2020-09-21 10:30:49,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@109e1536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:30:49, skipping insertion in model container [2020-09-21 10:30:49,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:30:49" (3/3) ... [2020-09-21 10:30:49,839 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-09-21 10:30:49,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:30:49,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:30:49,882 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:30:49,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:30:49,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:30:49,913 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:30:49,913 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:30:49,913 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:30:49,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:30:49,914 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:30:49,914 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:30:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-21 10:30:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:30:49,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:49,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:49,942 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-09-21 10:30:49,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:49,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888009557] [2020-09-21 10:30:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:50,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:50,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888009557] [2020-09-21 10:30:50,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:50,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:30:50,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020911189] [2020-09-21 10:30:50,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:30:50,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:30:50,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:30:50,219 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-21 10:30:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:50,291 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-09-21 10:30:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:30:50,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-21 10:30:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:50,306 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:30:50,306 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 10:30:50,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:30:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 10:30:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 10:30:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:30:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-09-21 10:30:50,374 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-09-21 10:30:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:50,374 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-09-21 10:30:50,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:30:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-09-21 10:30:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:30:50,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:50,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:50,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:30:50,377 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:50,378 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-09-21 10:30:50,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:50,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626279003] [2020-09-21 10:30:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:50,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:50,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626279003] [2020-09-21 10:30:50,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:30:50,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:30:50,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95225919] [2020-09-21 10:30:50,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:30:50,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:30:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:30:50,790 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2020-09-21 10:30:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:30:55,156 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-09-21 10:30:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:30:55,157 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-09-21 10:30:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:30:55,158 INFO L225 Difference]: With dead ends: 26 [2020-09-21 10:30:55,159 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:30:55,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:30:55,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:30:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-09-21 10:30:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 10:30:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-09-21 10:30:55,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-09-21 10:30:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:30:55,168 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-09-21 10:30:55,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:30:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-09-21 10:30:55,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 10:30:55,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:30:55,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:30:55,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:30:55,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:30:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:30:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-09-21 10:30:55,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:30:55,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994233540] [2020-09-21 10:30:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:30:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:55,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:30:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:30:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:30:55,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994233540] [2020-09-21 10:30:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:30:55,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:30:55,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129912750] [2020-09-21 10:30:55,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:30:55,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:30:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:30:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:30:55,829 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 13 states. [2020-09-21 10:31:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:00,455 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-09-21 10:31:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:31:00,456 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-09-21 10:31:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:00,457 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:31:00,457 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:31:00,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:31:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:31:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-09-21 10:31:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 10:31:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-09-21 10:31:00,464 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-09-21 10:31:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:00,465 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-09-21 10:31:00,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:31:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-09-21 10:31:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 10:31:00,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:00,466 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:00,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:31:00,466 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash -162414684, now seen corresponding path program 2 times [2020-09-21 10:31:00,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:00,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234308740] [2020-09-21 10:31:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:00,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:00,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234308740] [2020-09-21 10:31:00,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:00,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:31:00,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919649027] [2020-09-21 10:31:00,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:31:00,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:31:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:31:00,800 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-09-21 10:31:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:01,105 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-09-21 10:31:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:31:01,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-09-21 10:31:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:01,107 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:31:01,107 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 10:31:01,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:31:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 10:31:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-09-21 10:31:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 10:31:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-09-21 10:31:01,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2020-09-21 10:31:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:01,115 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-09-21 10:31:01,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:31:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-09-21 10:31:01,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:31:01,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:01,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:01,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:31:01,117 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:01,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -444322542, now seen corresponding path program 1 times [2020-09-21 10:31:01,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:01,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174854102] [2020-09-21 10:31:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:01,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174854102] [2020-09-21 10:31:01,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:01,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:31:01,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693260326] [2020-09-21 10:31:01,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:31:01,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:01,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:31:01,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:31:01,243 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-09-21 10:31:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:01,351 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-09-21 10:31:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:31:01,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-09-21 10:31:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:01,353 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:31:01,353 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 10:31:01,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:31:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 10:31:01,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-09-21 10:31:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:31:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-09-21 10:31:01,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-09-21 10:31:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:01,360 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-09-21 10:31:01,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:31:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-09-21 10:31:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 10:31:01,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:01,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:01,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:31:01,362 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -450980439, now seen corresponding path program 1 times [2020-09-21 10:31:01,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:01,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216217083] [2020-09-21 10:31:01,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:01,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:01,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216217083] [2020-09-21 10:31:01,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:01,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:31:01,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025963145] [2020-09-21 10:31:01,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:31:01,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:31:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:31:01,699 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-09-21 10:31:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:01,889 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-09-21 10:31:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:31:01,890 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-21 10:31:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:01,890 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:31:01,890 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:31:01,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:31:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:31:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-21 10:31:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 10:31:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-09-21 10:31:01,897 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2020-09-21 10:31:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:01,897 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-09-21 10:31:01,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:31:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-09-21 10:31:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:31:01,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:01,898 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:01,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:31:01,899 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash -514824137, now seen corresponding path program 1 times [2020-09-21 10:31:01,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:01,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768877663] [2020-09-21 10:31:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:02,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768877663] [2020-09-21 10:31:02,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:02,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:31:02,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469645558] [2020-09-21 10:31:02,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:31:02,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:31:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:31:02,047 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-09-21 10:31:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:02,159 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-09-21 10:31:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:31:02,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-21 10:31:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:02,160 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:31:02,160 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 10:31:02,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:31:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 10:31:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-09-21 10:31:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 10:31:02,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-09-21 10:31:02,166 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-09-21 10:31:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:02,167 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-09-21 10:31:02,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:31:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-09-21 10:31:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:31:02,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:02,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:02,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:31:02,168 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1260183225, now seen corresponding path program 1 times [2020-09-21 10:31:02,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:02,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217189860] [2020-09-21 10:31:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:02,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:02,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217189860] [2020-09-21 10:31:02,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:02,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:31:02,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895365634] [2020-09-21 10:31:02,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:31:02,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:31:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:31:02,879 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 15 states. [2020-09-21 10:31:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:05,707 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-09-21 10:31:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:31:05,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-09-21 10:31:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:05,709 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:31:05,709 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:31:05,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:31:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:31:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-09-21 10:31:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 10:31:05,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-21 10:31:05,723 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-09-21 10:31:05,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:05,723 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-21 10:31:05,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:31:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-21 10:31:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 10:31:05,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:05,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:05,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:31:05,727 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:05,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 2 times [2020-09-21 10:31:05,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:05,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876428326] [2020-09-21 10:31:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:05,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:05,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876428326] [2020-09-21 10:31:05,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:05,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:31:05,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139212591] [2020-09-21 10:31:05,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:31:05,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:31:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:31:05,928 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-21 10:31:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:08,140 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-09-21 10:31:08,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:31:08,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-21 10:31:08,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:08,142 INFO L225 Difference]: With dead ends: 41 [2020-09-21 10:31:08,142 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 10:31:08,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:31:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 10:31:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-21 10:31:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 10:31:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 10:31:08,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-09-21 10:31:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:08,150 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 10:31:08,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:31:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 10:31:08,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:31:08,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:08,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:08,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:31:08,151 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:08,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1961236154, now seen corresponding path program 1 times [2020-09-21 10:31:08,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:08,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395128768] [2020-09-21 10:31:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:08,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:08,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395128768] [2020-09-21 10:31:08,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:08,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:31:08,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474435454] [2020-09-21 10:31:08,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:31:08,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:31:08,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:31:08,289 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-09-21 10:31:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:08,433 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-09-21 10:31:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:31:08,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 10:31:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:08,434 INFO L225 Difference]: With dead ends: 44 [2020-09-21 10:31:08,435 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 10:31:08,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:31:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 10:31:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-09-21 10:31:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:31:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-21 10:31:08,441 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2020-09-21 10:31:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:08,441 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-21 10:31:08,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:31:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-21 10:31:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 10:31:08,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:08,443 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:08,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:31:08,443 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash -230662155, now seen corresponding path program 1 times [2020-09-21 10:31:08,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:08,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137240992] [2020-09-21 10:31:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:13,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:31:13,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137240992] [2020-09-21 10:31:13,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:31:13,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:31:13,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740433233] [2020-09-21 10:31:13,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:31:13,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:31:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-09-21 10:31:13,009 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-09-21 10:31:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:20,224 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-09-21 10:31:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:31:20,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-21 10:31:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:20,226 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:31:20,226 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:31:20,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=28, Invalid=61, Unknown=1, NotChecked=0, Total=90 [2020-09-21 10:31:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:31:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-21 10:31:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 10:31:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-09-21 10:31:20,233 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-09-21 10:31:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:20,233 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-09-21 10:31:20,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:31:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-09-21 10:31:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:31:20,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:31:20,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:31:20,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:31:20,235 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:31:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:31:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-09-21 10:31:20,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:31:20,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002708320] [2020-09-21 10:31:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:31:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:20,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:31:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:31:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:31:20,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002708320] [2020-09-21 10:31:20,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:31:20,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:31:20,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339416629] [2020-09-21 10:31:20,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:31:20,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:31:20,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:31:20,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:31:20,386 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-09-21 10:31:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:31:20,518 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-09-21 10:31:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:31:20,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-21 10:31:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:31:20,519 INFO L225 Difference]: With dead ends: 31 [2020-09-21 10:31:20,519 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:31:20,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:31:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:31:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:31:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:31:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:31:20,521 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-09-21 10:31:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:31:20,522 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:31:20,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:31:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:31:20,522 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:31:20,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:31:20,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:31:20,683 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:31:20,683 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-09-21 10:31:20,683 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:31:20,683 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:31:20,683 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-09-21 10:31:20,684 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:31:20,684 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:31:20,684 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:31:20,684 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 10:31:20,684 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:31:20,684 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 10:31:20,684 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L268 CegarLoopResult]: For program point L27(lines 27 30) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L268 CegarLoopResult]: For program point L25(lines 25 30) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L268 CegarLoopResult]: For program point L27-2(lines 21 30) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 35) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L268 CegarLoopResult]: For program point L23(lines 23 30) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L268 CegarLoopResult]: For program point L21(lines 21 30) no Hoare annotation was computed. [2020-09-21 10:31:20,685 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 32) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0))) (and (<= main_~l~0 .cse0) (<= .cse0 main_~l~0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-09-21 10:31:20,686 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 32) the Hoare annotation is: (or (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0 (* 4294967296 (div main_~l~0 4294967296)))) (.cse0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0) 4294967296)))) (and (<= (+ main_~l~0 .cse0) .cse1) (< .cse1 (+ main_~l~0 .cse0 1)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-09-21 10:31:20,686 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 35) no Hoare annotation was computed. [2020-09-21 10:31:20,686 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 35) the Hoare annotation is: true [2020-09-21 10:31:20,686 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-21 10:31:20,686 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 10:31:20,686 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 10:31:20,687 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 10:31:20,687 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 10:31:20,687 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 10:31:20,687 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 10:31:20,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:31:20 BoogieIcfgContainer [2020-09-21 10:31:20,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:31:20,713 INFO L168 Benchmark]: Toolchain (without parser) took 31806.10 ms. Allocated memory was 143.1 MB in the beginning and 274.7 MB in the end (delta: 131.6 MB). Free memory was 103.4 MB in the beginning and 224.7 MB in the end (delta: -121.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:31:20,714 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:31:20,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 426.85 ms. Allocated memory is still 143.1 MB. Free memory was 102.8 MB in the beginning and 92.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-21 10:31:20,716 INFO L168 Benchmark]: Boogie Preprocessor took 135.72 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 92.9 MB in the beginning and 179.9 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:31:20,717 INFO L168 Benchmark]: RCFGBuilder took 353.76 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 165.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:31:20,718 INFO L168 Benchmark]: TraceAbstraction took 30879.68 ms. Allocated memory was 201.9 MB in the beginning and 274.7 MB in the end (delta: 72.9 MB). Free memory was 165.0 MB in the beginning and 224.7 MB in the end (delta: -59.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:31:20,722 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 143.1 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 426.85 ms. Allocated memory is still 143.1 MB. Free memory was 102.8 MB in the beginning and 92.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.72 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 92.9 MB in the beginning and 179.9 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 353.76 ms. Allocated memory is still 201.9 MB. Free memory was 179.9 MB in the beginning and 165.6 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30879.68 ms. Allocated memory was 201.9 MB in the beginning and 274.7 MB in the end (delta: 72.9 MB). Free memory was 165.0 MB in the beginning and 224.7 MB in the end (delta: -59.7 MB). Peak memory consumption was 13.2 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: ((l <= i + j + k + v3 + v4 && i + j + k + v3 + v4 <= l) || !(SIZE <= 20000001)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.6s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 22.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 506 SDslu, 239 SDs, 0 SdLazy, 743 SolverSat, 130 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 19.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 24 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 98 HoareAnnotationTreeSize, 19 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 248 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 52122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 42/80 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...