/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 0.1.25-72570d3 [2020-08-22 19:46:19,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:46:19,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:46:19,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:46:19,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:46:19,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:46:19,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:46:19,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:46:19,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:46:19,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:46:19,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:46:19,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:46:19,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:46:19,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:46:19,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:46:19,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:46:19,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:46:19,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:46:19,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:46:19,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:46:19,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:46:19,398 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:46:19,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:46:19,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:46:19,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:46:19,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:46:19,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:46:19,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:46:19,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:46:19,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:46:19,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:46:19,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:46:19,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:46:19,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:46:19,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:46:19,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:46:19,403 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:46:19,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:46:19,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:46:19,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:46:19,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:46:19,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:46:19,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:46:19,404 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:46:19,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:46:19,757 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:46:19,761 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:46:19,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:46:19,763 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:46:19,764 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-22 19:46:19,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c976d106/1afab50e928a4966b0685b87b7ff559c/FLAG10f2ccbaf [2020-08-22 19:46:20,363 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:46:20,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-22 19:46:20,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c976d106/1afab50e928a4966b0685b87b7ff559c/FLAG10f2ccbaf [2020-08-22 19:46:20,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c976d106/1afab50e928a4966b0685b87b7ff559c [2020-08-22 19:46:20,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:46:20,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:46:20,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:20,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:46:20,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:46:20,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:20" (1/1) ... [2020-08-22 19:46:20,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b84a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:20, skipping insertion in model container [2020-08-22 19:46:20,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:46:20" (1/1) ... [2020-08-22 19:46:20,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:46:20,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:46:20,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:20,974 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:46:20,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:46:21,020 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:46:21,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21 WrapperNode [2020-08-22 19:46:21,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:46:21,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:46:21,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:46:21,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:46:21,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (1/1) ... [2020-08-22 19:46:21,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:46:21,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:46:21,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:46:21,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:46:21,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (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 [2020-08-22 19:46:21,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:46:21,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:46:21,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:46:21,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:46:21,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:46:21,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:46:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:46:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:46:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:46:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:46:21,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:46:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:46:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:46:21,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:46:21,571 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:46:21,571 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:46:21,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:21 BoogieIcfgContainer [2020-08-22 19:46:21,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:46:21,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:46:21,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:46:21,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:46:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:46:20" (1/3) ... [2020-08-22 19:46:21,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4745288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:21, skipping insertion in model container [2020-08-22 19:46:21,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:46:21" (2/3) ... [2020-08-22 19:46:21,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4745288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:46:21, skipping insertion in model container [2020-08-22 19:46:21,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:46:21" (3/3) ... [2020-08-22 19:46:21,589 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-08-22 19:46:21,613 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:46:21,630 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:46:21,672 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:46:21,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:46:21,738 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:46:21,741 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:46:21,741 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:46:21,741 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:46:21,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:46:21,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:46:21,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:46:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-08-22 19:46:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 19:46:21,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:21,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:21,792 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2145994368, now seen corresponding path program 1 times [2020-08-22 19:46:21,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:21,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985506016] [2020-08-22 19:46:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:21,872 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:22,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985506016] [2020-08-22 19:46:22,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:46:22,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281698461] [2020-08-22 19:46:22,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:46:22,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:46:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:46:22,085 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-08-22 19:46:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:22,237 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-08-22 19:46:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:46:22,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 19:46:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:22,246 INFO L225 Difference]: With dead ends: 61 [2020-08-22 19:46:22,246 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 19:46:22,250 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 [2020-08-22 19:46:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 19:46:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-08-22 19:46:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 19:46:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-08-22 19:46:22,292 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-08-22 19:46:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:22,292 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-08-22 19:46:22,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:46:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-08-22 19:46:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 19:46:22,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:22,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:22,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:46:22,294 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:22,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:22,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2141881988, now seen corresponding path program 1 times [2020-08-22 19:46:22,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:22,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426682463] [2020-08-22 19:46:22,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:22,298 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:22,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426682463] [2020-08-22 19:46:22,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:46:22,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011779773] [2020-08-22 19:46:22,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:46:22,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:46:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:46:22,380 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-08-22 19:46:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:22,481 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-08-22 19:46:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 19:46:22,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-22 19:46:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:22,484 INFO L225 Difference]: With dead ends: 59 [2020-08-22 19:46:22,485 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 19:46:22,486 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 [2020-08-22 19:46:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 19:46:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-08-22 19:46:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 19:46:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-22 19:46:22,501 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 19 [2020-08-22 19:46:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:22,501 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-22 19:46:22,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:46:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-22 19:46:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:46:22,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:22,503 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] [2020-08-22 19:46:22,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:46:22,503 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:22,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1000622251, now seen corresponding path program 1 times [2020-08-22 19:46:22,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:22,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362840493] [2020-08-22 19:46:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:22,530 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:22,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362840493] [2020-08-22 19:46:22,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:22,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354393816] [2020-08-22 19:46:22,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:22,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:22,636 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-08-22 19:46:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:22,796 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-08-22 19:46:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:46:22,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-22 19:46:22,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:22,798 INFO L225 Difference]: With dead ends: 70 [2020-08-22 19:46:22,798 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 19:46:22,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 19:46:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-08-22 19:46:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 19:46:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-08-22 19:46:22,811 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 26 [2020-08-22 19:46:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:22,811 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-08-22 19:46:22,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-08-22 19:46:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:46:22,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:22,813 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] [2020-08-22 19:46:22,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:22,814 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 231352676, now seen corresponding path program 2 times [2020-08-22 19:46:22,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:22,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964621148] [2020-08-22 19:46:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:22,823 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:22,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964621148] [2020-08-22 19:46:22,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:22,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:46:22,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801120886] [2020-08-22 19:46:22,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:46:22,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:46:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:46:22,948 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 8 states. [2020-08-22 19:46:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:23,144 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-08-22 19:46:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:46:23,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-08-22 19:46:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:23,149 INFO L225 Difference]: With dead ends: 77 [2020-08-22 19:46:23,149 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 19:46:23,151 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 [2020-08-22 19:46:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 19:46:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2020-08-22 19:46:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 19:46:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-08-22 19:46:23,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 33 [2020-08-22 19:46:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:23,173 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-08-22 19:46:23,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:46:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-08-22 19:46:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 19:46:23,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:23,174 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] [2020-08-22 19:46:23,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:23,174 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1221138549, now seen corresponding path program 3 times [2020-08-22 19:46:23,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:23,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998103393] [2020-08-22 19:46:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:23,194 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:23,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998103393] [2020-08-22 19:46:23,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:23,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:46:23,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335079647] [2020-08-22 19:46:23,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:46:23,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:46:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:46:23,281 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-08-22 19:46:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:23,409 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-08-22 19:46:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:46:23,410 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-08-22 19:46:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:23,412 INFO L225 Difference]: With dead ends: 58 [2020-08-22 19:46:23,412 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 19:46:23,413 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 [2020-08-22 19:46:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 19:46:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-08-22 19:46:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 19:46:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-08-22 19:46:23,422 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 40 [2020-08-22 19:46:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:23,423 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-08-22 19:46:23,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:46:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-08-22 19:46:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 19:46:23,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:23,425 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] [2020-08-22 19:46:23,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:46:23,426 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash -842063729, now seen corresponding path program 1 times [2020-08-22 19:46:23,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:23,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287703267] [2020-08-22 19:46:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:23,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:46:23,435 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:413) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) 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) [2020-08-22 19:46:23,441 INFO L168 Benchmark]: Toolchain (without parser) took 2704.08 ms. Allocated memory was 136.3 MB in the beginning and 227.5 MB in the end (delta: 91.2 MB). Free memory was 101.1 MB in the beginning and 145.3 MB in the end (delta: -44.2 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:23,443 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:23,444 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.71 ms. Allocated memory is still 136.3 MB. Free memory was 100.7 MB in the beginning and 90.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:23,445 INFO L168 Benchmark]: Boogie Preprocessor took 146.68 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 176.0 MB in the end (delta: -85.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:23,445 INFO L168 Benchmark]: RCFGBuilder took 409.88 ms. Allocated memory is still 198.7 MB. Free memory was 176.0 MB in the beginning and 161.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:23,446 INFO L168 Benchmark]: TraceAbstraction took 1858.39 ms. Allocated memory was 198.7 MB in the beginning and 227.5 MB in the end (delta: 28.8 MB). Free memory was 161.2 MB in the beginning and 145.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:23,451 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 136.3 MB. Free memory was 118.9 MB in the beginning and 118.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.71 ms. Allocated memory is still 136.3 MB. Free memory was 100.7 MB in the beginning and 90.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.68 ms. Allocated memory was 136.3 MB in the beginning and 198.7 MB in the end (delta: 62.4 MB). Free memory was 90.8 MB in the beginning and 176.0 MB in the end (delta: -85.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.88 ms. Allocated memory is still 198.7 MB. Free memory was 176.0 MB in the beginning and 161.2 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1858.39 ms. Allocated memory was 198.7 MB in the beginning and 227.5 MB in the end (delta: 28.8 MB). Free memory was 161.2 MB in the beginning and 145.3 MB in the end (delta: 15.9 MB). Peak memory consumption was 44.7 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:413) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...