/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:00:43,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:00:43,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:00:43,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:00:43,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:00:43,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:00:43,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:00:43,180 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:00:43,193 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:00:43,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:00:43,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:00:43,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:00:43,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:00:43,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:00:43,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:00:43,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:00:43,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:00:43,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:00:43,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:00:43,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:00:43,200 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:00:43,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:00:43,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:00:43,201 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:00:43,201 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:00:43,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:00:43,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:00:43,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:00:43,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:00:43,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:00:43,202 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:00:43,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:00:43,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:00:43,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:00:43,598 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:00:43,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:00:43,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-10-23 22:00:43,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a0cbf27/e9ede8157e15453aad8d1158185eeb5a/FLAG430343dd5 [2020-10-23 22:00:44,309 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:00:44,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-10-23 22:00:44,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a0cbf27/e9ede8157e15453aad8d1158185eeb5a/FLAG430343dd5 [2020-10-23 22:00:44,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a0cbf27/e9ede8157e15453aad8d1158185eeb5a [2020-10-23 22:00:44,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:00:44,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:00:44,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:00:44,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:00:44,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:00:44,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:44,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123fb9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44, skipping insertion in model container [2020-10-23 22:00:44,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:44,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:00:44,715 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:00:44,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:00:44,922 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:00:44,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:00:44,961 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:00:44,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44 WrapperNode [2020-10-23 22:00:44,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:00:44,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:00:44,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:00:44,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:00:44,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:44,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:44,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:44,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:44,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:45,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:45,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (1/1) ... [2020-10-23 22:00:45,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:00:45,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:00:45,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:00:45,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:00:45,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (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 [2020-10-23 22:00:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:00:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:00:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:00:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:00:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:00:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:00:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:00:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:00:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 22:00:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 22:00:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:00:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:00:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:00:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:00:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:00:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:00:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:00:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:00:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:00:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:00:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:00:45,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:00:45,678 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:00:45,678 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:00:45,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:45 BoogieIcfgContainer [2020-10-23 22:00:45,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:00:45,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:00:45,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:00:45,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:00:45,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:00:44" (1/3) ... [2020-10-23 22:00:45,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f25d7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:45, skipping insertion in model container [2020-10-23 22:00:45,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:44" (2/3) ... [2020-10-23 22:00:45,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f25d7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:45, skipping insertion in model container [2020-10-23 22:00:45,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:45" (3/3) ... [2020-10-23 22:00:45,690 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-10-23 22:00:45,701 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:00:45,707 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:00:45,721 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:00:45,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:00:45,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:00:45,748 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:00:45,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:00:45,748 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:00:45,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:00:45,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:00:45,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:00:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-23 22:00:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 22:00:45,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:45,778 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:45,778 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:45,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1775398781, now seen corresponding path program 1 times [2020-10-23 22:00:45,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:45,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736119066] [2020-10-23 22:00:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:45,901 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:46,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:46,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736119066] [2020-10-23 22:00:46,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:46,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:00:46,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59407576] [2020-10-23 22:00:46,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:00:46,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:00:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:00:46,253 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-10-23 22:00:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:46,487 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2020-10-23 22:00:46,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:00:46,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-23 22:00:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:46,500 INFO L225 Difference]: With dead ends: 106 [2020-10-23 22:00:46,500 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 22:00:46,505 INFO L677 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 [2020-10-23 22:00:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 22:00:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 22:00:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 22:00:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-23 22:00:46,569 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 33 [2020-10-23 22:00:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:46,570 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-23 22:00:46,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:00:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-23 22:00:46,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-23 22:00:46,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:46,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:46,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:00:46,574 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash -136611355, now seen corresponding path program 1 times [2020-10-23 22:00:46,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:46,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400994339] [2020-10-23 22:00:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:46,579 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:46,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:46,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400994339] [2020-10-23 22:00:46,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:46,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:00:46,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207171794] [2020-10-23 22:00:46,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:00:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:00:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:00:46,773 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2020-10-23 22:00:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:47,661 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-23 22:00:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:00:47,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-23 22:00:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:47,670 INFO L225 Difference]: With dead ends: 77 [2020-10-23 22:00:47,670 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 22:00:47,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:00:47,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 22:00:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-23 22:00:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 22:00:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-23 22:00:47,721 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 35 [2020-10-23 22:00:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:47,722 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-23 22:00:47,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:00:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-23 22:00:47,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 22:00:47,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:47,724 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:47,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:00:47,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1196890534, now seen corresponding path program 1 times [2020-10-23 22:00:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108270739] [2020-10-23 22:00:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:47,729 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:47,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:47,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 22:00:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:47,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108270739] [2020-10-23 22:00:47,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:47,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:00:47,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189147054] [2020-10-23 22:00:47,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:00:47,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:00:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:00:47,896 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 7 states. [2020-10-23 22:00:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:48,517 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-10-23 22:00:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 22:00:48,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-23 22:00:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:48,519 INFO L225 Difference]: With dead ends: 81 [2020-10-23 22:00:48,520 INFO L226 Difference]: Without dead ends: 77 [2020-10-23 22:00:48,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-23 22:00:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-23 22:00:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2020-10-23 22:00:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 22:00:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-23 22:00:48,541 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 40 [2020-10-23 22:00:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:48,541 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-23 22:00:48,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:00:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-23 22:00:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-23 22:00:48,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:48,544 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:48,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:00:48,544 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash 132999514, now seen corresponding path program 1 times [2020-10-23 22:00:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:48,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063585581] [2020-10-23 22:00:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:48,548 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:48,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:48,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 22:00:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:48,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-23 22:00:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:48,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063585581] [2020-10-23 22:00:48,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:48,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:00:48,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983368638] [2020-10-23 22:00:48,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:00:48,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:48,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:00:48,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:00:48,679 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 8 states. [2020-10-23 22:00:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:49,313 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-23 22:00:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 22:00:49,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-23 22:00:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:49,317 INFO L225 Difference]: With dead ends: 88 [2020-10-23 22:00:49,317 INFO L226 Difference]: Without dead ends: 84 [2020-10-23 22:00:49,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-23 22:00:49,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-23 22:00:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-23 22:00:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-23 22:00:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-10-23 22:00:49,340 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 48 [2020-10-23 22:00:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:49,341 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-10-23 22:00:49,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:00:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-10-23 22:00:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 22:00:49,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:49,344 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:49,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:00:49,344 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2088261755, now seen corresponding path program 1 times [2020-10-23 22:00:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:49,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636385501] [2020-10-23 22:00:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:49,348 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:49,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:49,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-23 22:00:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:49,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-23 22:00:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:49,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-23 22:00:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:49,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636385501] [2020-10-23 22:00:49,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:49,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:00:49,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058117724] [2020-10-23 22:00:49,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:00:49,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:49,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:00:49,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:00:49,499 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 9 states. [2020-10-23 22:00:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:50,207 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-10-23 22:00:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 22:00:50,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-23 22:00:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:50,212 INFO L225 Difference]: With dead ends: 92 [2020-10-23 22:00:50,212 INFO L226 Difference]: Without dead ends: 72 [2020-10-23 22:00:50,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-23 22:00:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-23 22:00:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-23 22:00:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-23 22:00:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-23 22:00:50,244 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 53 [2020-10-23 22:00:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:50,246 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-23 22:00:50,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:00:50,246 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-23 22:00:50,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 22:00:50,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:50,253 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:50,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:00:50,254 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:50,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash -15556804, now seen corresponding path program 1 times [2020-10-23 22:00:50,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:50,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125361704] [2020-10-23 22:00:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:50,260 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:50,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:00:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 22:00:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:50,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125361704] [2020-10-23 22:00:50,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:50,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 22:00:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954677397] [2020-10-23 22:00:50,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 22:00:50,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:50,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 22:00:50,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 22:00:50,417 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 8 states. [2020-10-23 22:00:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:51,091 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2020-10-23 22:00:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 22:00:51,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-23 22:00:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:51,094 INFO L225 Difference]: With dead ends: 105 [2020-10-23 22:00:51,094 INFO L226 Difference]: Without dead ends: 101 [2020-10-23 22:00:51,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-23 22:00:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-23 22:00:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2020-10-23 22:00:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-23 22:00:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-10-23 22:00:51,144 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 52 [2020-10-23 22:00:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:51,148 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-10-23 22:00:51,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 22:00:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-10-23 22:00:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 22:00:51,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:51,150 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:51,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 22:00:51,152 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2032807907, now seen corresponding path program 1 times [2020-10-23 22:00:51,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:51,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758534077] [2020-10-23 22:00:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:51,158 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:00:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-23 22:00:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:51,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-23 22:00:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:00:51,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758534077] [2020-10-23 22:00:51,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:51,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 22:00:51,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550599071] [2020-10-23 22:00:51,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 22:00:51,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:51,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 22:00:51,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:00:51,422 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 10 states. [2020-10-23 22:00:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:52,273 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-10-23 22:00:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 22:00:52,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-23 22:00:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:52,276 INFO L225 Difference]: With dead ends: 109 [2020-10-23 22:00:52,277 INFO L226 Difference]: Without dead ends: 105 [2020-10-23 22:00:52,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-23 22:00:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-23 22:00:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-23 22:00:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 22:00:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2020-10-23 22:00:52,302 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 57 [2020-10-23 22:00:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:52,302 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2020-10-23 22:00:52,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 22:00:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2020-10-23 22:00:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-23 22:00:52,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:52,304 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 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] [2020-10-23 22:00:52,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 22:00:52,305 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1727226990, now seen corresponding path program 1 times [2020-10-23 22:00:52,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:52,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049311927] [2020-10-23 22:00:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:52,308 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.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) 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:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 22:00:52,315 INFO L168 Benchmark]: Toolchain (without parser) took 7648.84 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 128.0 MB in the beginning and 130.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:52,316 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:00:52,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.43 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:52,318 INFO L168 Benchmark]: Boogie Preprocessor took 42.64 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:52,319 INFO L168 Benchmark]: RCFGBuilder took 673.51 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 134.3 MB in the end (delta: -18.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:52,320 INFO L168 Benchmark]: TraceAbstraction took 6629.65 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 133.7 MB in the beginning and 130.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 69.8 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:52,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.43 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 117.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.64 ms. Allocated memory is still 151.0 MB. Free memory was 117.7 MB in the beginning and 116.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 673.51 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 134.3 MB in the end (delta: -18.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6629.65 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 133.7 MB in the beginning and 130.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 69.8 MB. Max. memory is 8.0 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.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...