/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/loop-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:07:13,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:07:13,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:07:13,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:07:13,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:07:13,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:07:13,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:07:13,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:07:13,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:07:13,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:07:13,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:07:13,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:07:13,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:07:13,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:07:13,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:07:13,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:07:13,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:07:13,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:07:13,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:07:13,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:07:13,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:07:13,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:07:13,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:07:13,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:07:13,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 18:07:13,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 18:07:13,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 18:07:13,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 18:07:13,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 18:07:13,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 18:07:13,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:07:13,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:07:13,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:07:13,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:07:13,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:07:13,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:07:13,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:07:13,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:07:13,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:07:13,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:07:13,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:07:13,979 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 18:07:14,002 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:07:14,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:07:14,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:07:14,004 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:07:14,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:07:14,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:07:14,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:07:14,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:07:14,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:07:14,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:07:14,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:07:14,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:07:14,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:07:14,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:07:14,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:07:14,015 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:07:14,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:07:14,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:07:14,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:07:14,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:07:14,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:07:14,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:07:14,016 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 18:07:14,315 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:07:14,330 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:07:14,334 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:07:14,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:07:14,336 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:07:14,336 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-07-17 18:07:14,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675ffa42a/c26ab9e81c024d2582c6e369339a8f8c/FLAG8318c6a30 [2020-07-17 18:07:14,869 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:07:14,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2020-07-17 18:07:14,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675ffa42a/c26ab9e81c024d2582c6e369339a8f8c/FLAG8318c6a30 [2020-07-17 18:07:15,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675ffa42a/c26ab9e81c024d2582c6e369339a8f8c [2020-07-17 18:07:15,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:07:15,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:07:15,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:07:15,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:07:15,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:07:15,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffe76b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15, skipping insertion in model container [2020-07-17 18:07:15,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:07:15,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:07:15,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:07:15,487 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:07:15,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:07:15,518 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:07:15,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15 WrapperNode [2020-07-17 18:07:15,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:07:15,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:07:15,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:07:15,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:07:15,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (1/1) ... [2020-07-17 18:07:15,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:07:15,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:07:15,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:07:15,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:07:15,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (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 18:07:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:07:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:07:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:07:15,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:07:15,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:07:15,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:07:15,699 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:07:15,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:07:15,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-17 18:07:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:07:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:07:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:07:15,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:07:15,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:07:15,892 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:07:15,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:07:15 BoogieIcfgContainer [2020-07-17 18:07:15,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:07:15,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:07:15,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:07:15,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:07:15,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:07:15" (1/3) ... [2020-07-17 18:07:15,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f61636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:07:15, skipping insertion in model container [2020-07-17 18:07:15,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:07:15" (2/3) ... [2020-07-17 18:07:15,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f61636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:07:15, skipping insertion in model container [2020-07-17 18:07:15,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:07:15" (3/3) ... [2020-07-17 18:07:15,903 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2020-07-17 18:07:15,913 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:07:15,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:07:15,933 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:07:15,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:07:15,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:07:15,955 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:07:15,955 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:07:15,955 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:07:15,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:07:15,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:07:15,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:07:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-17 18:07:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 18:07:15,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:15,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:15,978 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:15,983 INFO L82 PathProgramCache]: Analyzing trace with hash 31250732, now seen corresponding path program 1 times [2020-07-17 18:07:15,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:15,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975803509] [2020-07-17 18:07:15,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:16,090 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 18:07:16,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975803509] [2020-07-17 18:07:16,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:07:16,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 18:07:16,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727405226] [2020-07-17 18:07:16,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 18:07:16,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:07:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 18:07:16,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:07:16,115 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-07-17 18:07:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:07:16,140 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-07-17 18:07:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 18:07:16,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-17 18:07:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:07:16,149 INFO L225 Difference]: With dead ends: 37 [2020-07-17 18:07:16,150 INFO L226 Difference]: Without dead ends: 19 [2020-07-17 18:07:16,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:07:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-17 18:07:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-17 18:07:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-17 18:07:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-17 18:07:16,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2020-07-17 18:07:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:07:16,193 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-17 18:07:16,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 18:07:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-17 18:07:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-17 18:07:16,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:07:16,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:07:16,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:07:16,195 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:07:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:07:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash 18321438, now seen corresponding path program 1 times [2020-07-17 18:07:16,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:07:16,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064814701] [2020-07-17 18:07:16,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:07:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:07:16,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:07:16,284 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-17 18:07:16,290 INFO L168 Benchmark]: Toolchain (without parser) took 984.07 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 104.0 MB in the beginning and 144.7 MB in the end (delta: -40.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:16,291 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 18:07:16,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.47 ms. Allocated memory is still 138.4 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:16,293 INFO L168 Benchmark]: Boogie Preprocessor took 109.40 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.8 MB in the beginning and 181.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:16,294 INFO L168 Benchmark]: RCFGBuilder took 266.31 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 168.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:16,295 INFO L168 Benchmark]: TraceAbstraction took 390.06 ms. Allocated memory is still 202.4 MB. Free memory was 167.4 MB in the beginning and 144.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-07-17 18:07:16,299 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 212.47 ms. Allocated memory is still 138.4 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.40 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.8 MB in the beginning and 181.2 MB in the end (delta: -87.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.31 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 168.1 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 390.06 ms. Allocated memory is still 202.4 MB. Free memory was 167.4 MB in the beginning and 144.7 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 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...