/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 23:36:37,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 23:36:37,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 23:36:37,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 23:36:37,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 23:36:37,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 23:36:37,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 23:36:37,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 23:36:37,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 23:36:37,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 23:36:37,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 23:36:37,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 23:36:37,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 23:36:37,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 23:36:37,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 23:36:37,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 23:36:37,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 23:36:37,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 23:36:37,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 23:36:37,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 23:36:37,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 23:36:37,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 23:36:37,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 23:36:37,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 23:36:37,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-08 23:36:37,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-08 23:36:37,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-08 23:36:37,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-08 23:36:37,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-08 23:36:37,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-08 23:36:37,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-08 23:36:37,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-08 23:36:37,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-08 23:36:37,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-08 23:36:37,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-08 23:36:37,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-08 23:36:37,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-08 23:36:37,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-08 23:36:37,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 23:36:37,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 23:36:37,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 23:36:37,149 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 23:36:37,158 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 23:36:37,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 23:36:37,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 23:36:37,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 23:36:37,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 23:36:37,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 23:36:37,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 23:36:37,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 23:36:37,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 23:36:37,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 23:36:37,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 23:36:37,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 23:36:37,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 23:36:37,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 23:36:37,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 23:36:37,162 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 23:36:37,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 23:36:37,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 23:36:37,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 23:36:37,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 23:36:37,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 23:36:37,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 23:36:37,163 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-08 23:36:37,424 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 23:36:37,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 23:36:37,442 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 23:36:37,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 23:36:37,444 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 23:36:37,445 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-07-08 23:36:37,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceebab45c/952aeaddfc854e259785ee424b2f9762/FLAGac0d03f50 [2020-07-08 23:36:37,912 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 23:36:37,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-07-08 23:36:37,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceebab45c/952aeaddfc854e259785ee424b2f9762/FLAGac0d03f50 [2020-07-08 23:36:38,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceebab45c/952aeaddfc854e259785ee424b2f9762 [2020-07-08 23:36:38,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 23:36:38,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 23:36:38,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 23:36:38,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 23:36:38,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 23:36:38,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11474de2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38, skipping insertion in model container [2020-07-08 23:36:38,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 23:36:38,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 23:36:38,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 23:36:38,658 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 23:36:38,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 23:36:38,864 INFO L208 MainTranslator]: Completed translation [2020-07-08 23:36:38,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38 WrapperNode [2020-07-08 23:36:38,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 23:36:38,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 23:36:38,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 23:36:38,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 23:36:38,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (1/1) ... [2020-07-08 23:36:38,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 23:36:38,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 23:36:38,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 23:36:38,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 23:36:38,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (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 23:36:38,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 23:36:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 23:36:38,971 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 23:36:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 23:36:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 23:36:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-08 23:36:38,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-08 23:36:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 23:36:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-08 23:36:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-07-08 23:36:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 23:36:38,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-08 23:36:39,298 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 23:36:39,298 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-08 23:36:39,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 11:36:39 BoogieIcfgContainer [2020-07-08 23:36:39,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 23:36:39,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 23:36:39,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 23:36:39,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 23:36:39,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 11:36:38" (1/3) ... [2020-07-08 23:36:39,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b517f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 11:36:39, skipping insertion in model container [2020-07-08 23:36:39,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 11:36:38" (2/3) ... [2020-07-08 23:36:39,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35b517f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 11:36:39, skipping insertion in model container [2020-07-08 23:36:39,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 11:36:39" (3/3) ... [2020-07-08 23:36:39,311 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-07-08 23:36:39,325 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 23:36:39,332 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 23:36:39,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 23:36:39,394 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 23:36:39,394 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 23:36:39,394 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-08 23:36:39,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 23:36:39,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 23:36:39,395 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 23:36:39,395 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 23:36:39,395 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 23:36:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-07-08 23:36:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-08 23:36:39,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 23:36:39,432 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] [2020-07-08 23:36:39,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 23:36:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 23:36:39,440 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-07-08 23:36:39,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 23:36:39,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841620631] [2020-07-08 23:36:39,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 23:36:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 23:36:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 23:36:39,757 INFO L280 TraceCheckUtils]: 0: Hoare triple {60#(and (= |~#array~0.base| |old(~#array~0.base)|) (= |~#array~0.offset| |old(~#array~0.offset)|) (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#length)| |#length|))} #NULL.base, #NULL.offset := 0, 0; {50#true} is VALID [2020-07-08 23:36:39,758 INFO L280 TraceCheckUtils]: 1: Hoare triple {50#true} #valid := #valid[0 := 0]; {50#true} is VALID [2020-07-08 23:36:39,758 INFO L280 TraceCheckUtils]: 2: Hoare triple {50#true} assume 0 < #StackHeapBarrier; {50#true} is VALID [2020-07-08 23:36:39,759 INFO L280 TraceCheckUtils]: 3: Hoare triple {50#true} SUMMARY for call ~#array~0.base, ~#array~0.offset := #Ultimate.allocOnStack(1048576); srcloc: L7 {50#true} is VALID [2020-07-08 23:36:39,759 INFO L280 TraceCheckUtils]: 4: Hoare triple {50#true} #memory_int := ~initToZeroAtPointerBaseAddress~int(#memory_int, ~#array~0.base); {50#true} is VALID [2020-07-08 23:36:39,759 INFO L280 TraceCheckUtils]: 5: Hoare triple {50#true} SUMMARY for call write~unchecked~int(1, ~#array~0.base, ~#array~0.offset, 1); srcloc: L7-2 {50#true} is VALID [2020-07-08 23:36:39,760 INFO L280 TraceCheckUtils]: 6: Hoare triple {50#true} assume true; {50#true} is VALID [2020-07-08 23:36:39,760 INFO L275 TraceCheckUtils]: 7: Hoare quadruple {50#true} {50#true} #80#return; {50#true} is VALID [2020-07-08 23:36:39,764 INFO L263 TraceCheckUtils]: 0: Hoare triple {50#true} call ULTIMATE.init(); {60#(and (= |~#array~0.base| |old(~#array~0.base)|) (= |~#array~0.offset| |old(~#array~0.offset)|) (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#length)| |#length|))} is VALID [2020-07-08 23:36:39,765 INFO L280 TraceCheckUtils]: 1: Hoare triple {60#(and (= |~#array~0.base| |old(~#array~0.base)|) (= |~#array~0.offset| |old(~#array~0.offset)|) (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#length)| |#length|))} #NULL.base, #NULL.offset := 0, 0; {50#true} is VALID [2020-07-08 23:36:39,765 INFO L280 TraceCheckUtils]: 2: Hoare triple {50#true} #valid := #valid[0 := 0]; {50#true} is VALID [2020-07-08 23:36:39,765 INFO L280 TraceCheckUtils]: 3: Hoare triple {50#true} assume 0 < #StackHeapBarrier; {50#true} is VALID [2020-07-08 23:36:39,766 INFO L280 TraceCheckUtils]: 4: Hoare triple {50#true} SUMMARY for call ~#array~0.base, ~#array~0.offset := #Ultimate.allocOnStack(1048576); srcloc: L7 {50#true} is VALID [2020-07-08 23:36:39,766 INFO L280 TraceCheckUtils]: 5: Hoare triple {50#true} #memory_int := ~initToZeroAtPointerBaseAddress~int(#memory_int, ~#array~0.base); {50#true} is VALID [2020-07-08 23:36:39,766 INFO L280 TraceCheckUtils]: 6: Hoare triple {50#true} SUMMARY for call write~unchecked~int(1, ~#array~0.base, ~#array~0.offset, 1); srcloc: L7-2 {50#true} is VALID [2020-07-08 23:36:39,767 INFO L280 TraceCheckUtils]: 7: Hoare triple {50#true} assume true; {50#true} is VALID [2020-07-08 23:36:39,767 INFO L275 TraceCheckUtils]: 8: Hoare quadruple {50#true} {50#true} #80#return; {50#true} is VALID [2020-07-08 23:36:39,767 INFO L263 TraceCheckUtils]: 9: Hoare triple {50#true} call #t~ret6 := main(#in~argc, #in~argv.base, #in~argv.offset); {50#true} is VALID [2020-07-08 23:36:39,768 INFO L280 TraceCheckUtils]: 10: Hoare triple {50#true} ~argc := #in~argc; {50#true} is VALID [2020-07-08 23:36:39,768 INFO L280 TraceCheckUtils]: 11: Hoare triple {50#true} ~argv.base, ~argv.offset := #in~argv.base, #in~argv.offset; {50#true} is VALID [2020-07-08 23:36:39,769 INFO L280 TraceCheckUtils]: 12: Hoare triple {50#true} ~a~0 := 1; {50#true} is VALID [2020-07-08 23:36:39,769 INFO L280 TraceCheckUtils]: 13: Hoare triple {50#true} havoc ~i~0; {50#true} is VALID [2020-07-08 23:36:39,769 INFO L280 TraceCheckUtils]: 14: Hoare triple {50#true} havoc ~j~0; {50#true} is VALID [2020-07-08 23:36:39,770 INFO L280 TraceCheckUtils]: 15: Hoare triple {50#true} havoc ~k~0; {50#true} is VALID [2020-07-08 23:36:39,770 INFO L280 TraceCheckUtils]: 16: Hoare triple {50#true} ~i~0 := 0; {50#true} is VALID [2020-07-08 23:36:39,771 INFO L280 TraceCheckUtils]: 17: Hoare triple {50#true} assume !true; {51#false} is VALID [2020-07-08 23:36:39,772 INFO L280 TraceCheckUtils]: 18: Hoare triple {51#false} assume 1 != ~a~0 % 4294967296; {51#false} is VALID [2020-07-08 23:36:39,772 INFO L280 TraceCheckUtils]: 19: Hoare triple {51#false} assume !false; {51#false} is VALID [2020-07-08 23:36:39,775 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 23:36:39,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841620631] [2020-07-08 23:36:39,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 23:36:39,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-08 23:36:39,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697671305] [2020-07-08 23:36:39,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-08 23:36:39,788 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 23:36:39,792 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-08 23:36:39,830 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 23:36:39,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-08 23:36:39,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 23:36:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-08 23:36:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-08 23:36:39,843 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-07-08 23:36:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 23:36:40,287 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-07-08 23:36:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-08 23:36:40,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-08 23:36:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 23:36:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-08 23:36:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2020-07-08 23:36:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-08 23:36:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2020-07-08 23:36:40,310 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 117 transitions. [2020-07-08 23:36:40,529 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 117 edges. 117 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 23:36:40,557 INFO L225 Difference]: With dead ends: 98 [2020-07-08 23:36:40,558 INFO L226 Difference]: Without dead ends: 56 [2020-07-08 23:36:40,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-08 23:36:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-08 23:36:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-07-08 23:36:40,642 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 23:36:40,643 INFO L82 GeneralOperation]: Start isEquivalent. First operand 56 states. Second operand 39 states. [2020-07-08 23:36:40,644 INFO L74 IsIncluded]: Start isIncluded. First operand 56 states. Second operand 39 states. [2020-07-08 23:36:40,644 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 39 states. [2020-07-08 23:36:40,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 23:36:40,649 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-07-08 23:36:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-08 23:36:40,650 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 23:36:40,651 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 23:36:40,651 INFO L74 IsIncluded]: Start isIncluded. First operand 39 states. Second operand 56 states. [2020-07-08 23:36:40,651 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 56 states. [2020-07-08 23:36:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 23:36:40,656 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-07-08 23:36:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-07-08 23:36:40,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 23:36:40,657 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 23:36:40,657 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 23:36:40,658 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 23:36:40,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-08 23:36:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-07-08 23:36:40,662 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-07-08 23:36:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 23:36:40,663 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-07-08 23:36:40,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-08 23:36:40,663 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 39 states and 41 transitions. [2020-07-08 23:36:40,715 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 23:36:40,715 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-07-08 23:36:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-08 23:36:40,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 23:36:40,716 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] [2020-07-08 23:36:40,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 23:36:40,717 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 23:36:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 23:36:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-07-08 23:36:40,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 23:36:40,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243569959] [2020-07-08 23:36:40,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 23:36:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 23:36:40,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 23:36:40,757 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) at de.uni_freiburg.informatik.ultimate.smtinterpol.proof.ProofTermGenerator.convert(ProofTermGenerator.java:150) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getProof(SMTInterpol.java:799) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:883) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:385) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:337) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:239) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) 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 23:36:40,767 INFO L168 Benchmark]: Toolchain (without parser) took 2398.86 ms. Allocated memory was 137.4 MB in the beginning and 265.3 MB in the end (delta: 127.9 MB). Free memory was 102.0 MB in the beginning and 207.5 MB in the end (delta: -105.4 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-08 23:36:40,769 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-08 23:36:40,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 499.44 ms. Allocated memory was 137.4 MB in the beginning and 216.0 MB in the end (delta: 78.6 MB). Free memory was 101.8 MB in the beginning and 201.9 MB in the end (delta: -100.1 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2020-07-08 23:36:40,776 INFO L168 Benchmark]: Boogie Preprocessor took 43.47 ms. Allocated memory is still 216.0 MB. Free memory was 201.9 MB in the beginning and 199.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-07-08 23:36:40,777 INFO L168 Benchmark]: RCFGBuilder took 393.90 ms. Allocated memory is still 216.0 MB. Free memory was 199.3 MB in the beginning and 173.6 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-07-08 23:36:40,778 INFO L168 Benchmark]: TraceAbstraction took 1456.27 ms. Allocated memory was 216.0 MB in the beginning and 265.3 MB in the end (delta: 49.3 MB). Free memory was 173.6 MB in the beginning and 207.5 MB in the end (delta: -33.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-08 23:36:40,787 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 0.84 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 499.44 ms. Allocated memory was 137.4 MB in the beginning and 216.0 MB in the end (delta: 78.6 MB). Free memory was 101.8 MB in the beginning and 201.9 MB in the end (delta: -100.1 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.47 ms. Allocated memory is still 216.0 MB. Free memory was 201.9 MB in the beginning and 199.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.90 ms. Allocated memory is still 216.0 MB. Free memory was 199.3 MB in the beginning and 173.6 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1456.27 ms. Allocated memory was 216.0 MB in the beginning and 265.3 MB in the end (delta: 49.3 MB). Free memory was 173.6 MB in the beginning and 207.5 MB in the end (delta: -33.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.proof.FixResolutionProof.fix(FixResolutionProof.java:191) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...