/usr/bin/java -ea -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-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 17:38:56,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 17:38:56,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 17:38:56,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 17:38:56,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 17:38:56,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 17:38:56,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 17:38:56,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 17:38:56,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 17:38:56,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 17:38:56,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 17:38:56,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 17:38:56,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 17:38:56,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 17:38:56,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 17:38:56,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 17:38:56,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 17:38:56,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 17:38:56,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 17:38:56,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 17:38:56,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 17:38:56,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 17:38:56,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 17:38:56,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 17:38:56,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-08 17:38:56,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 17:38:56,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 17:38:56,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 17:38:56,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-08 17:38:56,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 17:38:56,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 17:38:56,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 17:38:56,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 17:38:56,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 17:38:56,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 17:38:56,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 17:38:56,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 17:38:56,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 17:38:56,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 17:38:56,264 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 17:38:56,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 17:38:56,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 17:38:56,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 17:38:56,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 17:38:56,265 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 17:38:56,265 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 17:38:56,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 17:38:56,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 17:38:56,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 17:38:56,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 17:38:56,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 17:38:56,266 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 17:38:56,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 17:38:56,608 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 17:38:56,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 17:38:56,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 17:38:56,616 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 17:38:56,617 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-08 17:38:56,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47503761c/bd2f71c51a7e4599a8231565c996c93c/FLAGc5588a026 [2020-07-08 17:38:57,146 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 17:38:57,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-08 17:38:57,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47503761c/bd2f71c51a7e4599a8231565c996c93c/FLAGc5588a026 [2020-07-08 17:38:57,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47503761c/bd2f71c51a7e4599a8231565c996c93c [2020-07-08 17:38:57,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 17:38:57,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 17:38:57,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 17:38:57,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 17:38:57,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 17:38:57,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:57,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb8949b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57, skipping insertion in model container [2020-07-08 17:38:57,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:57,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 17:38:57,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 17:38:57,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 17:38:57,865 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 17:38:57,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 17:38:57,895 INFO L208 MainTranslator]: Completed translation [2020-07-08 17:38:57,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57 WrapperNode [2020-07-08 17:38:57,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 17:38:57,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 17:38:57,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 17:38:57,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 17:38:57,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:57,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:57,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:57,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:58,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:58,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:58,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... [2020-07-08 17:38:58,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 17:38:58,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 17:38:58,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 17:38:58,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 17:38:58,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 17:38:58,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 17:38:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 17:38:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-08 17:38:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-08 17:38:58,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 17:38:58,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 17:38:58,068 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-08 17:38:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-08 17:38:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-08 17:38:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-08 17:38:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 17:38:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 17:38:58,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 17:38:58,417 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 17:38:58,417 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-08 17:38:58,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 05:38:58 BoogieIcfgContainer [2020-07-08 17:38:58,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 17:38:58,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 17:38:58,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 17:38:58,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 17:38:58,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 05:38:57" (1/3) ... [2020-07-08 17:38:58,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ead419e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 05:38:58, skipping insertion in model container [2020-07-08 17:38:58,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:38:57" (2/3) ... [2020-07-08 17:38:58,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ead419e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 05:38:58, skipping insertion in model container [2020-07-08 17:38:58,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 05:38:58" (3/3) ... [2020-07-08 17:38:58,430 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-07-08 17:38:58,441 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 17:38:58,448 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 17:38:58,463 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 17:38:58,483 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 17:38:58,484 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 17:38:58,484 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 17:38:58,484 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 17:38:58,484 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 17:38:58,484 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 17:38:58,484 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 17:38:58,485 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 17:38:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-08 17:38:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-08 17:38:58,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 17:38:58,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-08 17:38:58,510 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 17:38:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 17:38:58,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2141903635, now seen corresponding path program 1 times [2020-07-08 17:38:58,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 17:38:58,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500949921] [2020-07-08 17:38:58,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 17:38:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:38:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:38:58,790 INFO L280 TraceCheckUtils]: 0: Hoare triple {37#true} assume true; {37#true} is VALID [2020-07-08 17:38:58,790 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {37#true} {37#true} #67#return; {37#true} is VALID [2020-07-08 17:38:58,792 INFO L263 TraceCheckUtils]: 0: Hoare triple {37#true} call ULTIMATE.init(); {37#true} is VALID [2020-07-08 17:38:58,793 INFO L280 TraceCheckUtils]: 1: Hoare triple {37#true} assume true; {37#true} is VALID [2020-07-08 17:38:58,793 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {37#true} {37#true} #67#return; {37#true} is VALID [2020-07-08 17:38:58,793 INFO L263 TraceCheckUtils]: 3: Hoare triple {37#true} call #t~ret3 := main(); {37#true} is VALID [2020-07-08 17:38:58,794 INFO L280 TraceCheckUtils]: 4: Hoare triple {37#true} havoc ~offset~0; {37#true} is VALID [2020-07-08 17:38:58,794 INFO L280 TraceCheckUtils]: 5: Hoare triple {37#true} havoc ~length~0; {37#true} is VALID [2020-07-08 17:38:58,794 INFO L280 TraceCheckUtils]: 6: Hoare triple {37#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {37#true} is VALID [2020-07-08 17:38:58,795 INFO L280 TraceCheckUtils]: 7: Hoare triple {37#true} ~nlen~0 := #t~nondet0; {37#true} is VALID [2020-07-08 17:38:58,795 INFO L280 TraceCheckUtils]: 8: Hoare triple {37#true} havoc #t~nondet0; {37#true} is VALID [2020-07-08 17:38:58,795 INFO L280 TraceCheckUtils]: 9: Hoare triple {37#true} havoc ~i~0; {37#true} is VALID [2020-07-08 17:38:58,796 INFO L280 TraceCheckUtils]: 10: Hoare triple {37#true} havoc ~j~0; {37#true} is VALID [2020-07-08 17:38:58,796 INFO L280 TraceCheckUtils]: 11: Hoare triple {37#true} ~i~0 := 0; {37#true} is VALID [2020-07-08 17:38:58,797 INFO L280 TraceCheckUtils]: 12: Hoare triple {37#true} assume !!(~i~0 < ~nlen~0); {41#(< main_~i~0 main_~nlen~0)} is VALID [2020-07-08 17:38:58,798 INFO L280 TraceCheckUtils]: 13: Hoare triple {41#(< main_~i~0 main_~nlen~0)} ~j~0 := 0; {41#(< main_~i~0 main_~nlen~0)} is VALID [2020-07-08 17:38:58,799 INFO L280 TraceCheckUtils]: 14: Hoare triple {41#(< main_~i~0 main_~nlen~0)} assume !!(~j~0 < 8); {41#(< main_~i~0 main_~nlen~0)} is VALID [2020-07-08 17:38:58,801 INFO L263 TraceCheckUtils]: 15: Hoare triple {41#(< main_~i~0 main_~nlen~0)} call __VERIFIER_assert((if 0 <= ~nlen~0 - 1 - ~i~0 then 1 else 0)); {42#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-08 17:38:58,804 INFO L280 TraceCheckUtils]: 16: Hoare triple {42#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {43#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-08 17:38:58,805 INFO L280 TraceCheckUtils]: 17: Hoare triple {43#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {38#false} is VALID [2020-07-08 17:38:58,805 INFO L280 TraceCheckUtils]: 18: Hoare triple {38#false} assume !false; {38#false} is VALID [2020-07-08 17:38:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-08 17:38:58,809 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 17:38:58,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500949921] [2020-07-08 17:38:58,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 17:38:58,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-08 17:38:58,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847877217] [2020-07-08 17:38:58,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-08 17:38:58,823 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 17:38:58,827 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-08 17:38:58,887 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:38:58,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-08 17:38:58,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 17:38:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-08 17:38:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-08 17:38:58,901 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-07-08 17:38:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:38:59,183 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-07-08 17:38:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-08 17:38:59,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-08 17:38:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 17:38:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 17:38:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2020-07-08 17:38:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 17:38:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2020-07-08 17:38:59,204 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 72 transitions. [2020-07-08 17:38:59,343 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 72 edges. 72 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:38:59,356 INFO L225 Difference]: With dead ends: 60 [2020-07-08 17:38:59,356 INFO L226 Difference]: Without dead ends: 33 [2020-07-08 17:38:59,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-08 17:38:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-08 17:38:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-08 17:38:59,431 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 17:38:59,432 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand 33 states. [2020-07-08 17:38:59,432 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand 33 states. [2020-07-08 17:38:59,432 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 33 states. [2020-07-08 17:38:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:38:59,437 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-07-08 17:38:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-08 17:38:59,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 17:38:59,438 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 17:38:59,439 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand 33 states. [2020-07-08 17:38:59,439 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 33 states. [2020-07-08 17:38:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:38:59,443 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-07-08 17:38:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-08 17:38:59,444 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 17:38:59,444 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 17:38:59,444 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 17:38:59,445 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 17:38:59,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-08 17:38:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-08 17:38:59,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 19 [2020-07-08 17:38:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 17:38:59,450 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-08 17:38:59,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-08 17:38:59,451 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 33 states and 34 transitions. [2020-07-08 17:38:59,497 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 34 edges. 34 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:38:59,497 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-08 17:38:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-08 17:38:59,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 17:38:59,498 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] [2020-07-08 17:38:59,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 17:38:59,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 17:38:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 17:38:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1520201371, now seen corresponding path program 1 times [2020-07-08 17:38:59,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 17:38:59,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550239721] [2020-07-08 17:38:59,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 17:38:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:38:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:38:59,642 INFO L280 TraceCheckUtils]: 0: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-08 17:38:59,643 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {300#true} {300#true} #67#return; {300#true} is VALID [2020-07-08 17:38:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:38:59,652 INFO L280 TraceCheckUtils]: 0: Hoare triple {300#true} ~cond := #in~cond; {300#true} is VALID [2020-07-08 17:38:59,653 INFO L280 TraceCheckUtils]: 1: Hoare triple {300#true} assume !(0 == ~cond); {300#true} is VALID [2020-07-08 17:38:59,653 INFO L280 TraceCheckUtils]: 2: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-08 17:38:59,655 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {300#true} {304#(< 0 (+ main_~i~0 1))} #71#return; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-08 17:38:59,655 INFO L263 TraceCheckUtils]: 0: Hoare triple {300#true} call ULTIMATE.init(); {300#true} is VALID [2020-07-08 17:38:59,655 INFO L280 TraceCheckUtils]: 1: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-08 17:38:59,656 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {300#true} {300#true} #67#return; {300#true} is VALID [2020-07-08 17:38:59,656 INFO L263 TraceCheckUtils]: 3: Hoare triple {300#true} call #t~ret3 := main(); {300#true} is VALID [2020-07-08 17:38:59,656 INFO L280 TraceCheckUtils]: 4: Hoare triple {300#true} havoc ~offset~0; {300#true} is VALID [2020-07-08 17:38:59,657 INFO L280 TraceCheckUtils]: 5: Hoare triple {300#true} havoc ~length~0; {300#true} is VALID [2020-07-08 17:38:59,657 INFO L280 TraceCheckUtils]: 6: Hoare triple {300#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {300#true} is VALID [2020-07-08 17:38:59,657 INFO L280 TraceCheckUtils]: 7: Hoare triple {300#true} ~nlen~0 := #t~nondet0; {300#true} is VALID [2020-07-08 17:38:59,658 INFO L280 TraceCheckUtils]: 8: Hoare triple {300#true} havoc #t~nondet0; {300#true} is VALID [2020-07-08 17:38:59,658 INFO L280 TraceCheckUtils]: 9: Hoare triple {300#true} havoc ~i~0; {300#true} is VALID [2020-07-08 17:38:59,658 INFO L280 TraceCheckUtils]: 10: Hoare triple {300#true} havoc ~j~0; {300#true} is VALID [2020-07-08 17:38:59,659 INFO L280 TraceCheckUtils]: 11: Hoare triple {300#true} ~i~0 := 0; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-08 17:38:59,660 INFO L280 TraceCheckUtils]: 12: Hoare triple {304#(< 0 (+ main_~i~0 1))} assume !!(~i~0 < ~nlen~0); {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-08 17:38:59,661 INFO L280 TraceCheckUtils]: 13: Hoare triple {304#(< 0 (+ main_~i~0 1))} ~j~0 := 0; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-08 17:38:59,662 INFO L280 TraceCheckUtils]: 14: Hoare triple {304#(< 0 (+ main_~i~0 1))} assume !!(~j~0 < 8); {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-08 17:38:59,662 INFO L263 TraceCheckUtils]: 15: Hoare triple {304#(< 0 (+ main_~i~0 1))} call __VERIFIER_assert((if 0 <= ~nlen~0 - 1 - ~i~0 then 1 else 0)); {300#true} is VALID [2020-07-08 17:38:59,663 INFO L280 TraceCheckUtils]: 16: Hoare triple {300#true} ~cond := #in~cond; {300#true} is VALID [2020-07-08 17:38:59,663 INFO L280 TraceCheckUtils]: 17: Hoare triple {300#true} assume !(0 == ~cond); {300#true} is VALID [2020-07-08 17:38:59,663 INFO L280 TraceCheckUtils]: 18: Hoare triple {300#true} assume true; {300#true} is VALID [2020-07-08 17:38:59,664 INFO L275 TraceCheckUtils]: 19: Hoare quadruple {300#true} {304#(< 0 (+ main_~i~0 1))} #71#return; {304#(< 0 (+ main_~i~0 1))} is VALID [2020-07-08 17:38:59,666 INFO L263 TraceCheckUtils]: 20: Hoare triple {304#(< 0 (+ main_~i~0 1))} call __VERIFIER_assert((if ~nlen~0 - 1 - ~i~0 < ~nlen~0 then 1 else 0)); {309#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-08 17:38:59,667 INFO L280 TraceCheckUtils]: 21: Hoare triple {309#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {310#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-08 17:38:59,668 INFO L280 TraceCheckUtils]: 22: Hoare triple {310#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {301#false} is VALID [2020-07-08 17:38:59,668 INFO L280 TraceCheckUtils]: 23: Hoare triple {301#false} assume !false; {301#false} is VALID [2020-07-08 17:38:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-08 17:38:59,670 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 17:38:59,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550239721] [2020-07-08 17:38:59,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 17:38:59,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-08 17:38:59,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329982723] [2020-07-08 17:38:59,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-08 17:38:59,673 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 17:38:59,673 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-08 17:38:59,701 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:38:59,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-08 17:38:59,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 17:38:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-08 17:38:59,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-08 17:38:59,703 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 5 states. [2020-07-08 17:38:59,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:38:59,914 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-07-08 17:38:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-08 17:38:59,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-08 17:38:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 17:38:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 17:38:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2020-07-08 17:38:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-08 17:38:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2020-07-08 17:38:59,922 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 49 transitions. [2020-07-08 17:38:59,982 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 49 edges. 49 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:38:59,985 INFO L225 Difference]: With dead ends: 49 [2020-07-08 17:38:59,985 INFO L226 Difference]: Without dead ends: 47 [2020-07-08 17:38:59,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-08 17:38:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-08 17:39:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-07-08 17:39:00,048 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 17:39:00,049 INFO L82 GeneralOperation]: Start isEquivalent. First operand 47 states. Second operand 45 states. [2020-07-08 17:39:00,049 INFO L74 IsIncluded]: Start isIncluded. First operand 47 states. Second operand 45 states. [2020-07-08 17:39:00,049 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 45 states. [2020-07-08 17:39:00,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:39:00,055 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-07-08 17:39:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-08 17:39:00,057 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 17:39:00,057 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 17:39:00,057 INFO L74 IsIncluded]: Start isIncluded. First operand 45 states. Second operand 47 states. [2020-07-08 17:39:00,058 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 47 states. [2020-07-08 17:39:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:39:00,063 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-07-08 17:39:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-07-08 17:39:00,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 17:39:00,064 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 17:39:00,065 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 17:39:00,065 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 17:39:00,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-08 17:39:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-08 17:39:00,069 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 24 [2020-07-08 17:39:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 17:39:00,070 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-08 17:39:00,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-08 17:39:00,070 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 45 states and 48 transitions. [2020-07-08 17:39:00,132 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:39:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-08 17:39:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-08 17:39:00,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 17:39:00,134 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-07-08 17:39:00,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 17:39:00,135 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 17:39:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 17:39:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1589830701, now seen corresponding path program 1 times [2020-07-08 17:39:00,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 17:39:00,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936518201] [2020-07-08 17:39:00,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 17:39:00,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-08 17:39:00,147 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-08 17:39:00,153 INFO L168 Benchmark]: Toolchain (without parser) took 2549.25 ms. Allocated memory was 146.8 MB in the beginning and 234.9 MB in the end (delta: 88.1 MB). Free memory was 105.4 MB in the beginning and 103.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 90.2 MB. Max. memory is 7.1 GB. [2020-07-08 17:39:00,155 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-08 17:39:00,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.34 ms. Allocated memory is still 146.8 MB. Free memory was 105.0 MB in the beginning and 94.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-08 17:39:00,157 INFO L168 Benchmark]: Boogie Preprocessor took 113.41 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 94.9 MB in the beginning and 180.5 MB in the end (delta: -85.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-08 17:39:00,157 INFO L168 Benchmark]: RCFGBuilder took 411.19 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 161.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-07-08 17:39:00,158 INFO L168 Benchmark]: TraceAbstraction took 1727.61 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 160.7 MB in the beginning and 103.3 MB in the end (delta: 57.4 MB). Peak memory consumption was 90.4 MB. Max. memory is 7.1 GB. [2020-07-08 17:39:00,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.34 ms. Allocated memory is still 146.8 MB. Free memory was 105.0 MB in the beginning and 94.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.41 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 94.9 MB in the beginning and 180.5 MB in the end (delta: -85.6 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.19 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 161.4 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1727.61 ms. Allocated memory was 201.9 MB in the beginning and 234.9 MB in the end (delta: 33.0 MB). Free memory was 160.7 MB in the beginning and 103.3 MB in the end (delta: 57.4 MB). Peak memory consumption was 90.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...