/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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-crafted-1/sumt2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:09:58,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:09:58,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:09:58,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:09:58,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:09:58,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:09:58,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:09:58,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:09:58,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:09:58,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:09:58,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:09:58,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:09:58,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:09:58,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:09:58,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:09:58,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:09:58,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:09:58,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:09:58,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:09:58,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:09:58,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:09:58,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:09:58,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:09:58,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:09:58,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:09:58,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:09:58,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:09:58,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:09:58,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:09:58,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:09:58,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:09:58,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:09:58,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:09:58,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:09:58,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:09:58,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:09:58,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:09:58,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:09:58,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:09:58,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:09:58,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:09:58,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:09:58,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:09:58,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:09:58,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:09:58,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:09:58,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:09:58,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:09:58,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:09:58,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:09:58,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:09:58,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:09:58,355 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:09:58,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:09:58,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:09:58,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:09:58,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:09:58,360 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:09:58,360 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:09:58,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:09:58,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:09:58,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:09:58,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:09:58,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:09:58,361 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 [2020-07-17 18:09:58,718 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:09:58,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:09:58,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:09:58,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:09:58,741 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:09:58,742 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-07-17 18:09:58,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdc79ecb/9e1560a68abb40dd90ed2ccd358b857d/FLAG107e6c742 [2020-07-17 18:09:59,414 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:09:59,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-07-17 18:09:59,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdc79ecb/9e1560a68abb40dd90ed2ccd358b857d/FLAG107e6c742 [2020-07-17 18:09:59,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdc79ecb/9e1560a68abb40dd90ed2ccd358b857d [2020-07-17 18:09:59,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:09:59,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:09:59,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:09:59,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:09:59,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:09:59,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:09:59" (1/1) ... [2020-07-17 18:09:59,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f97057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:09:59, skipping insertion in model container [2020-07-17 18:09:59,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:09:59" (1/1) ... [2020-07-17 18:09:59,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:09:59,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:10:00,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:10:00,046 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:10:00,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:10:00,087 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:10:00,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00 WrapperNode [2020-07-17 18:10:00,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:10:00,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:10:00,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:10:00,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:10:00,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (1/1) ... [2020-07-17 18:10:00,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:10:00,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:10:00,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:10:00,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:10:00,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (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 [2020-07-17 18:10:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:10:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:10:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:10:00,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:10:00,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:10:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:10:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:10:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:10:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:10:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:10:00,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:10:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:10:00,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:10:00,570 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:10:00,570 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:10:00,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:10:00 BoogieIcfgContainer [2020-07-17 18:10:00,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:10:00,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:10:00,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:10:00,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:10:00,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:09:59" (1/3) ... [2020-07-17 18:10:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d108ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:10:00, skipping insertion in model container [2020-07-17 18:10:00,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:10:00" (2/3) ... [2020-07-17 18:10:00,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d108ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:10:00, skipping insertion in model container [2020-07-17 18:10:00,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:10:00" (3/3) ... [2020-07-17 18:10:00,594 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt2.c [2020-07-17 18:10:00,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:10:00,632 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:10:00,657 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:10:00,687 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:10:00,687 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:10:00,687 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:10:00,688 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:10:00,688 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:10:00,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:10:00,689 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:10:00,689 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:10:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-17 18:10:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 18:10:00,742 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:00,744 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] [2020-07-17 18:10:00,745 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:00,751 INFO L82 PathProgramCache]: Analyzing trace with hash 960346385, now seen corresponding path program 1 times [2020-07-17 18:10:00,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:00,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620910195] [2020-07-17 18:10:00,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:00,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620910195] [2020-07-17 18:10:00,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:10:00,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:10:00,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459329085] [2020-07-17 18:10:00,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:10:00,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:00,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:10:00,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:10:00,964 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-07-17 18:10:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:01,047 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-17 18:10:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:10:01,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-17 18:10:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:01,062 INFO L225 Difference]: With dead ends: 46 [2020-07-17 18:10:01,062 INFO L226 Difference]: Without dead ends: 26 [2020-07-17 18:10:01,068 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 [2020-07-17 18:10:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-17 18:10:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-17 18:10:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-17 18:10:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-07-17 18:10:01,128 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-07-17 18:10:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:01,129 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-07-17 18:10:01,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:10:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-07-17 18:10:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-17 18:10:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:01,131 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] [2020-07-17 18:10:01,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:10:01,132 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash 948340612, now seen corresponding path program 1 times [2020-07-17 18:10:01,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:01,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849262426] [2020-07-17 18:10:01,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:01,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:10:01,218 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Asserted terms must be closed at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkFinalInterpolants(InterpolantChecker.java:423) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:218) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:874) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-17 18:10:01,229 INFO L168 Benchmark]: Toolchain (without parser) took 1453.36 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 103.6 MB in the beginning and 143.0 MB in the end (delta: -39.4 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:01,230 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 138.4 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 18:10:01,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.05 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:01,236 INFO L168 Benchmark]: Boogie Preprocessor took 131.00 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 93.6 MB in the beginning and 184.1 MB in the end (delta: -90.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:01,238 INFO L168 Benchmark]: RCFGBuilder took 357.64 ms. Allocated memory is still 203.9 MB. Free memory was 184.1 MB in the beginning and 169.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:01,240 INFO L168 Benchmark]: TraceAbstraction took 642.35 ms. Allocated memory is still 203.9 MB. Free memory was 168.8 MB in the beginning and 143.0 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:10:01,253 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 138.4 MB. Free memory was 121.9 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.05 ms. Allocated memory is still 138.4 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.00 ms. Allocated memory was 138.4 MB in the beginning and 203.9 MB in the end (delta: 65.5 MB). Free memory was 93.6 MB in the beginning and 184.1 MB in the end (delta: -90.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.64 ms. Allocated memory is still 203.9 MB. Free memory was 184.1 MB in the beginning and 169.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 642.35 ms. Allocated memory is still 203.9 MB. Free memory was 168.8 MB in the beginning and 143.0 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Asserted terms must be closed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Asserted terms must be closed: de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...