/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 14:53:20,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 14:53:20,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 14:53:20,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 14:53:20,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 14:53:20,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 14:53:20,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 14:53:20,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 14:53:20,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 14:53:20,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 14:53:20,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 14:53:20,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 14:53:20,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 14:53:20,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 14:53:20,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 14:53:20,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 14:53:20,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 14:53:20,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 14:53:20,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 14:53:20,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 14:53:20,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 14:53:20,972 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 14:53:20,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 14:53:20,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 14:53:20,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 14:53:20,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 14:53:20,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 14:53:20,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 14:53:20,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 14:53:20,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-17 14:53:20,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 14:53:20,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 14:53:20,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 14:53:20,992 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 14:53:21,009 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 14:53:21,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 14:53:21,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 14:53:21,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 14:53:21,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 14:53:21,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 14:53:21,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 14:53:21,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 14:53:21,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 14:53:21,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 14:53:21,015 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 14:53:21,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 14:53:21,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 14:53:21,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 14:53:21,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 14:53:21,016 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 14:53:21,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 14:53:21,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 14:53:21,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 14:53:21,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 14:53:21,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 14:53:21,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 14:53:21,017 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 14:53:21,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 14:53:21,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 14:53:21,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 14:53:21,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 14:53:21,328 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 14:53:21,329 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-17 14:53:21,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b1cf50a/08cd1975b5794fb3b846f2fb4d1cf4e6/FLAGf7e8825f0 [2020-07-17 14:53:21,889 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 14:53:21,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-17 14:53:21,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b1cf50a/08cd1975b5794fb3b846f2fb4d1cf4e6/FLAGf7e8825f0 [2020-07-17 14:53:22,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b1cf50a/08cd1975b5794fb3b846f2fb4d1cf4e6 [2020-07-17 14:53:22,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 14:53:22,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 14:53:22,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:22,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 14:53:22,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 14:53:22,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1279cfc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22, skipping insertion in model container [2020-07-17 14:53:22,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 14:53:22,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 14:53:22,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:22,520 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 14:53:22,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 14:53:22,568 INFO L208 MainTranslator]: Completed translation [2020-07-17 14:53:22,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22 WrapperNode [2020-07-17 14:53:22,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 14:53:22,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 14:53:22,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 14:53:22,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 14:53:22,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (1/1) ... [2020-07-17 14:53:22,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 14:53:22,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 14:53:22,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 14:53:22,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 14:53:22,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (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 14:53:22,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 14:53:22,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 14:53:22,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 14:53:22,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 14:53:22,780 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 14:53:22,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 14:53:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 14:53:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 14:53:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 14:53:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 14:53:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 14:53:22,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 14:53:22,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 14:53:23,054 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 14:53:23,055 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-17 14:53:23,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:23 BoogieIcfgContainer [2020-07-17 14:53:23,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 14:53:23,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 14:53:23,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 14:53:23,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 14:53:23,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 02:53:22" (1/3) ... [2020-07-17 14:53:23,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515adbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:23, skipping insertion in model container [2020-07-17 14:53:23,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 02:53:22" (2/3) ... [2020-07-17 14:53:23,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@515adbdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 02:53:23, skipping insertion in model container [2020-07-17 14:53:23,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 02:53:23" (3/3) ... [2020-07-17 14:53:23,073 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-17 14:53:23,090 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 14:53:23,100 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 14:53:23,118 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 14:53:23,152 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 14:53:23,152 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 14:53:23,153 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 14:53:23,153 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 14:53:23,153 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 14:53:23,153 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 14:53:23,153 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 14:53:23,154 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 14:53:23,172 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-07-17 14:53:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 14:53:23,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:23,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:23,186 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:23,192 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-07-17 14:53:23,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:23,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223177463] [2020-07-17 14:53:23,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:23,479 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 14:53:23,482 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:23,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223177463] [2020-07-17 14:53:23,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:23,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 14:53:23,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089062002] [2020-07-17 14:53:23,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 14:53:23,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 14:53:23,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 14:53:23,510 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-07-17 14:53:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:23,707 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-07-17 14:53:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 14:53:23,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-07-17 14:53:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:23,719 INFO L225 Difference]: With dead ends: 113 [2020-07-17 14:53:23,719 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 14:53:23,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 14:53:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 14:53:23,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-17 14:53:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-17 14:53:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-07-17 14:53:23,772 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-07-17 14:53:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:23,772 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-07-17 14:53:23,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 14:53:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-07-17 14:53:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-17 14:53:23,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:23,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:23,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 14:53:23,775 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-07-17 14:53:23,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:23,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832310459] [2020-07-17 14:53:23,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 14:53:23,900 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 14:53:23,903 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 14:53:23,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832310459] [2020-07-17 14:53:23,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 14:53:23,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 14:53:23,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092048104] [2020-07-17 14:53:23,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 14:53:23,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 14:53:23,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 14:53:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 14:53:23,906 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-07-17 14:53:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 14:53:24,112 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2020-07-17 14:53:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 14:53:24,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-07-17 14:53:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 14:53:24,115 INFO L225 Difference]: With dead ends: 99 [2020-07-17 14:53:24,116 INFO L226 Difference]: Without dead ends: 74 [2020-07-17 14:53:24,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 14:53:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-17 14:53:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-07-17 14:53:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 14:53:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-07-17 14:53:24,135 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-07-17 14:53:24,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 14:53:24,136 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-07-17 14:53:24,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 14:53:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-07-17 14:53:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 14:53:24,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 14:53:24,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 14:53:24,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 14:53:24,139 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 14:53:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 14:53:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-07-17 14:53:24,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 14:53:24,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600326673] [2020-07-17 14:53:24,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 14:53:24,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 14:53:24,169 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:290) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:191) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-07-17 14:53:24,175 INFO L168 Benchmark]: Toolchain (without parser) took 1887.20 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 100.3 MB in the beginning and 90.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:24,177 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-17 14:53:24,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.95 ms. Allocated memory is still 136.8 MB. Free memory was 99.9 MB in the beginning and 89.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:24,179 INFO L168 Benchmark]: Boogie Preprocessor took 150.04 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 89.5 MB in the beginning and 178.8 MB in the end (delta: -89.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:24,180 INFO L168 Benchmark]: RCFGBuilder took 343.08 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 159.8 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:24,181 INFO L168 Benchmark]: TraceAbstraction took 1108.33 ms. Allocated memory is still 201.3 MB. Free memory was 159.2 MB in the beginning and 90.7 MB in the end (delta: 68.4 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. [2020-07-17 14:53:24,185 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 136.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.95 ms. Allocated memory is still 136.8 MB. Free memory was 99.9 MB in the beginning and 89.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.04 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 89.5 MB in the beginning and 178.8 MB in the end (delta: -89.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.08 ms. Allocated memory is still 201.3 MB. Free memory was 178.8 MB in the beginning and 159.8 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1108.33 ms. Allocated memory is still 201.3 MB. Free memory was 159.2 MB in the beginning and 90.7 MB in the end (delta: 68.4 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:458) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...