/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/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:29:19,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:29:19,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:29:19,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:29:19,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:29:19,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:29:19,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:29:19,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:29:19,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:29:19,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:29:19,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:29:19,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:29:19,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:29:19,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:29:19,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:29:19,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:29:19,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:29:19,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:29:19,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:29:19,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:29:19,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:29:19,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:29:19,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:29:19,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:29:19,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 13:29:19,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:29:19,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:29:19,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:29:19,847 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 13:29:19,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:29:19,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:29:19,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:29:19,879 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:29:19,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:29:19,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:29:19,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:29:19,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:29:19,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:29:19,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:29:19,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:29:19,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:29:19,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:29:19,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:29:19,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:29:19,881 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:29:19,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:29:19,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:29:19,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:29:19,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:29:19,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:29:19,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:29:19,885 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:29:20,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:29:20,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:29:20,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:29:20,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:29:20,176 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:29:20,177 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-07-17 13:29:20,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d88a9cc4/70a676e2331744d49f4c9c9089497418/FLAG96cf9c3fe [2020-07-17 13:29:20,686 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:29:20,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-07-17 13:29:20,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d88a9cc4/70a676e2331744d49f4c9c9089497418/FLAG96cf9c3fe [2020-07-17 13:29:21,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d88a9cc4/70a676e2331744d49f4c9c9089497418 [2020-07-17 13:29:21,135 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:29:21,138 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:29:21,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:29:21,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:29:21,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:29:21,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717f8173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21, skipping insertion in model container [2020-07-17 13:29:21,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:29:21,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:29:21,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:29:21,349 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:29:21,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:29:21,383 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:29:21,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21 WrapperNode [2020-07-17 13:29:21,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:29:21,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:29:21,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:29:21,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:29:21,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (1/1) ... [2020-07-17 13:29:21,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:29:21,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:29:21,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:29:21,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:29:21,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (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 13:29:21,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:29:21,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:29:21,573 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-07-17 13:29:21,573 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-17 13:29:21,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:29:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:29:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-07-17 13:29:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 13:29:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 13:29:21,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 13:29:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-17 13:29:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:29:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 13:29:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 13:29:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 13:29:21,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:29:21,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:29:21,897 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:29:21,898 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 13:29:21,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:29:21 BoogieIcfgContainer [2020-07-17 13:29:21,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:29:21,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:29:21,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:29:21,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:29:21,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:29:21" (1/3) ... [2020-07-17 13:29:21,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daf5910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:29:21, skipping insertion in model container [2020-07-17 13:29:21,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:29:21" (2/3) ... [2020-07-17 13:29:21,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7daf5910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:29:21, skipping insertion in model container [2020-07-17 13:29:21,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:29:21" (3/3) ... [2020-07-17 13:29:21,911 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-07-17 13:29:21,923 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:29:21,930 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:29:21,944 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:29:21,965 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:29:21,965 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:29:21,966 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:29:21,966 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:29:21,966 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:29:21,966 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:29:21,966 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:29:21,966 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:29:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-07-17 13:29:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-17 13:29:22,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:29:22,018 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] [2020-07-17 13:29:22,019 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:29:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:29:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1600319067, now seen corresponding path program 1 times [2020-07-17 13:29:22,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:29:22,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505350644] [2020-07-17 13:29:22,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:29:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:29:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:29:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:29:22,474 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 13:29:22,596 WARN L860 $PredicateComparison]: unable to prove that (and (not (= 4 |c_f_#in~a|)) (exists ((|v_main_#t~ret5_6| Int)) (and (<= 0 (+ |v_main_#t~ret5_6| 2147483648)) (<= |v_main_#t~ret5_6| 2147483647) (exists ((|v_#memory_int_26| (Array Int (Array Int Int)))) (= (store |v_#memory_int_26| |c_main_~#a~0.base| (store (select |v_#memory_int_26| |c_main_~#a~0.base|) |c_main_~#a~0.offset| |v_main_#t~ret5_6|)) |c_#memory_int|))))) is different from true [2020-07-17 13:29:22,874 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:29:22,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505350644] [2020-07-17 13:29:22,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:29:22,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-17 13:29:22,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58966456] [2020-07-17 13:29:22,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 13:29:22,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:29:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 13:29:22,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=259, Unknown=2, NotChecked=32, Total=342 [2020-07-17 13:29:22,902 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 19 states. [2020-07-17 13:29:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:29:23,385 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-07-17 13:29:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 13:29:23,387 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-07-17 13:29:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:29:23,397 INFO L225 Difference]: With dead ends: 105 [2020-07-17 13:29:23,398 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 13:29:23,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=607, Unknown=2, NotChecked=50, Total=756 [2020-07-17 13:29:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 13:29:23,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-17 13:29:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-17 13:29:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 51 transitions. [2020-07-17 13:29:23,444 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 51 transitions. Word has length 39 [2020-07-17 13:29:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:29:23,445 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 51 transitions. [2020-07-17 13:29:23,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 13:29:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 51 transitions. [2020-07-17 13:29:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 13:29:23,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:29:23,447 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, 1, 1, 1] [2020-07-17 13:29:23,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:29:23,448 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:29:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:29:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2059010026, now seen corresponding path program 1 times [2020-07-17 13:29:23,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:29:23,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627214939] [2020-07-17 13:29:23,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:29:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:29:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:29:23,720 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:29:23,720 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 13:29:23,720 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 13:29:23,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:29:23,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:29:23 BoogieIcfgContainer [2020-07-17 13:29:23,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:29:23,766 INFO L168 Benchmark]: Toolchain (without parser) took 2625.07 ms. Allocated memory was 138.4 MB in the beginning and 235.9 MB in the end (delta: 97.5 MB). Free memory was 102.4 MB in the beginning and 122.2 MB in the end (delta: -19.8 MB). Peak memory consumption was 77.7 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,767 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.66 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,772 INFO L168 Benchmark]: Boogie Preprocessor took 125.25 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.1 MB in the beginning and 180.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,775 INFO L168 Benchmark]: RCFGBuilder took 393.36 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 158.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,776 INFO L168 Benchmark]: TraceAbstraction took 1855.43 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 157.4 MB in the beginning and 122.2 MB in the end (delta: 35.2 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. [2020-07-17 13:29:23,784 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.66 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 92.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.25 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.1 MB in the beginning and 180.5 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.36 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 158.0 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1855.43 ms. Allocated memory was 202.4 MB in the beginning and 235.9 MB in the end (delta: 33.6 MB). Free memory was 157.4 MB in the beginning and 122.2 MB in the end (delta: 35.2 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) [L32] CALL, EXPR f(a, &p1, &p2) [L12] COND TRUE a == 4 [L13] CALL g(p1, p2) [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 [L13] RET g(p1, p2) [L14] return 1; [L32] RET, EXPR f(a, &p1, &p2) [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 51 SDslu, 263 SDs, 0 SdLazy, 299 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...