/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:59:29,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:59:29,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:59:29,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:59:29,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:59:29,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:59:29,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:59:29,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:59:29,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:59:29,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:59:29,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:59:29,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:59:29,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:59:29,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:59:29,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:59:29,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:59:29,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:59:29,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:59:29,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:59:29,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:59:29,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:59:29,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:59:29,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:59:29,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:59:29,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:59:29,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:59:29,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:59:29,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:59:29,270 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:59:29,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:59:29,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:59:29,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:59:29,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:59:29,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:59:29,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:59:29,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:59:29,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:59:29,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:59:29,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:59:29,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:59:29,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:59:29,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:59:29,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:59:29,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:59:29,284 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:59:29,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:59:29,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:59:29,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:59:29,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:59:29,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:59:29,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:59:29,286 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:59:29,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:59:29,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:59:29,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:59:29,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:59:29,651 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:59:29,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-07 13:59:29,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5767ae46c/2e2fe5cf9ae7462ab03949957edf3f0f/FLAGe4e0ee24c [2020-07-07 13:59:30,177 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:59:30,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-07 13:59:30,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5767ae46c/2e2fe5cf9ae7462ab03949957edf3f0f/FLAGe4e0ee24c [2020-07-07 13:59:30,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5767ae46c/2e2fe5cf9ae7462ab03949957edf3f0f [2020-07-07 13:59:30,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:59:30,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:59:30,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:30,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:59:30,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:59:30,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7267bef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30, skipping insertion in model container [2020-07-07 13:59:30,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:59:30,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:59:30,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:30,769 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:59:30,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:59:30,813 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:59:30,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30 WrapperNode [2020-07-07 13:59:30,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:59:30,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:59:30,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:59:30,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:59:30,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (1/1) ... [2020-07-07 13:59:30,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:59:30,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:59:30,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:59:30,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:59:30,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (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 [2020-07-07 13:59:31,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:59:31,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:59:31,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 13:59:31,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:59:31,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:59:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:59:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 13:59:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:59:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:59:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:59:31,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:59:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:59:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:59:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:59:31,337 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:59:31,337 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 13:59:31,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:31 BoogieIcfgContainer [2020-07-07 13:59:31,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:59:31,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:59:31,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:59:31,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:59:31,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:59:30" (1/3) ... [2020-07-07 13:59:31,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bc35d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:31, skipping insertion in model container [2020-07-07 13:59:31,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:59:30" (2/3) ... [2020-07-07 13:59:31,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bc35d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:59:31, skipping insertion in model container [2020-07-07 13:59:31,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:59:31" (3/3) ... [2020-07-07 13:59:31,349 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-07-07 13:59:31,361 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:59:31,369 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:59:31,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:59:31,406 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:59:31,407 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:59:31,407 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:59:31,407 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:59:31,407 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:59:31,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:59:31,408 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:59:31,408 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:59:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-07 13:59:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 13:59:31,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,437 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-07-07 13:59:31,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567696720] [2020-07-07 13:59:31,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,646 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567696720] [2020-07-07 13:59:31,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 13:59:31,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954025614] [2020-07-07 13:59:31,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 13:59:31,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 13:59:31,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 13:59:31,675 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-07-07 13:59:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:31,824 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-07-07 13:59:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 13:59:31,827 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-07 13:59:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:31,836 INFO L225 Difference]: With dead ends: 61 [2020-07-07 13:59:31,836 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 13:59:31,841 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 [2020-07-07 13:59:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 13:59:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-07 13:59:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-07 13:59:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-07-07 13:59:31,884 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-07-07 13:59:31,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:31,885 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-07-07 13:59:31,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 13:59:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-07 13:59:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 13:59:31,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:31,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:31,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:59:31,887 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-07-07 13:59:31,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:31,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708285263] [2020-07-07 13:59:31,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:31,974 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:31,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708285263] [2020-07-07 13:59:31,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:31,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:59:31,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092110832] [2020-07-07 13:59:31,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:59:31,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:59:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:31,978 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-07-07 13:59:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,082 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-07-07 13:59:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:59:32,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-07-07 13:59:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,086 INFO L225 Difference]: With dead ends: 59 [2020-07-07 13:59:32,087 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 13:59:32,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:59:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 13:59:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-07-07 13:59:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 13:59:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-07-07 13:59:32,102 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-07-07 13:59:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,102 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-07-07 13:59:32,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:59:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-07-07 13:59:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 13:59:32,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:59:32,105 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-07-07 13:59:32,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383366920] [2020-07-07 13:59:32,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,318 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383366920] [2020-07-07 13:59:32,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:59:32,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191506455] [2020-07-07 13:59:32,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:59:32,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:59:32,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:59:32,326 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-07-07 13:59:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,542 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-07-07 13:59:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 13:59:32,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-07-07 13:59:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,546 INFO L225 Difference]: With dead ends: 70 [2020-07-07 13:59:32,547 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 13:59:32,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 13:59:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-07-07 13:59:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 13:59:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-07-07 13:59:32,559 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-07-07 13:59:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,559 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-07-07 13:59:32,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:59:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-07-07 13:59:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:59:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:59:32,562 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,562 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-07-07 13:59:32,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501150779] [2020-07-07 13:59:32,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,688 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501150779] [2020-07-07 13:59:32,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:59:32,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549077167] [2020-07-07 13:59:32,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:59:32,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:59:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:32,691 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-07-07 13:59:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:32,868 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-07-07 13:59:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 13:59:32,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-07 13:59:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:32,872 INFO L225 Difference]: With dead ends: 77 [2020-07-07 13:59:32,872 INFO L226 Difference]: Without dead ends: 59 [2020-07-07 13:59:32,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:59:32,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-07 13:59:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-07-07 13:59:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-07 13:59:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-07-07 13:59:32,884 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-07-07 13:59:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:32,885 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-07-07 13:59:32,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:59:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-07-07 13:59:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 13:59:32,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:32,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:32,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:59:32,887 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-07-07 13:59:32,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:32,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972632867] [2020-07-07 13:59:32,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:59:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:59:32,983 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:59:32,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972632867] [2020-07-07 13:59:32,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:59:32,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:59:32,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203067462] [2020-07-07 13:59:32,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:59:32,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:59:32,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:59:32,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:59:32,986 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-07-07 13:59:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:59:33,094 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-07-07 13:59:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 13:59:33,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-07-07 13:59:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:59:33,096 INFO L225 Difference]: With dead ends: 58 [2020-07-07 13:59:33,096 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 13:59:33,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:59:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 13:59:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-07-07 13:59:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-07 13:59:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-07-07 13:59:33,107 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-07-07 13:59:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:59:33,108 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-07-07 13:59:33,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:59:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-07-07 13:59:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-07 13:59:33,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:59:33,110 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:59:33,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:59:33,110 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:59:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:59:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash -842063729, now seen corresponding path program 1 times [2020-07-07 13:59:33,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:59:33,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421594168] [2020-07-07 13:59:33,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:59:33,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:59:33,119 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-07 13:59:33,125 INFO L168 Benchmark]: Toolchain (without parser) took 2566.88 ms. Allocated memory was 138.9 MB in the beginning and 236.5 MB in the end (delta: 97.5 MB). Free memory was 104.5 MB in the beginning and 150.9 MB in the end (delta: -46.5 MB). Peak memory consumption was 51.0 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:33,126 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 13:59:33,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 138.9 MB. Free memory was 104.2 MB in the beginning and 94.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:33,128 INFO L168 Benchmark]: Boogie Preprocessor took 146.42 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 180.6 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:33,129 INFO L168 Benchmark]: RCFGBuilder took 380.38 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 165.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:33,130 INFO L168 Benchmark]: TraceAbstraction took 1779.41 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 165.6 MB in the beginning and 150.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:59:33,134 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 138.9 MB. Free memory was 122.3 MB in the beginning and 122.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.99 ms. Allocated memory is still 138.9 MB. Free memory was 104.2 MB in the beginning and 94.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.42 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 94.3 MB in the beginning and 180.6 MB in the end (delta: -86.3 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.38 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 165.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1779.41 ms. Allocated memory was 202.4 MB in the beginning and 236.5 MB in the end (delta: 34.1 MB). Free memory was 165.6 MB in the beginning and 150.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...