/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/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:24:08,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:24:08,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:24:08,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:24:08,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:24:08,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:24:08,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:24:08,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:24:08,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:24:08,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:24:08,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:24:08,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:24:08,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:24:08,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:24:08,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:24:08,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:24:08,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:24:08,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:24:08,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:24:08,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:24:08,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:24:08,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:24:08,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:24:08,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:24:08,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:24:08,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:24:08,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:24:08,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:24:08,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:24:08,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:24:08,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:24:08,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:24:08,737 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:24:08,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:24:08,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:24:08,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:24:08,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:24:08,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:24:08,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:24:08,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:24:08,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:24:08,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:24:08,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:24:08,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:24:08,741 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:24:08,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:24:08,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:24:08,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:24:08,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:24:08,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:24:08,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:24:08,742 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:24:09,022 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:24:09,038 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:24:09,041 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:24:09,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:24:09,043 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:24:09,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-07-07 13:24:09,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7944cd1/be409dbbefcb4063a670404c087eaed3/FLAGabe4c9380 [2020-07-07 13:24:09,679 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:24:09,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c [2020-07-07 13:24:09,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7944cd1/be409dbbefcb4063a670404c087eaed3/FLAGabe4c9380 [2020-07-07 13:24:10,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7944cd1/be409dbbefcb4063a670404c087eaed3 [2020-07-07 13:24:10,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:24:10,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:24:10,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:10,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:24:10,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:24:10,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3e449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10, skipping insertion in model container [2020-07-07 13:24:10,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:24:10,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:24:10,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:10,369 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:24:10,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:24:10,413 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:24:10,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10 WrapperNode [2020-07-07 13:24:10,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:24:10,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:24:10,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:24:10,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:24:10,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (1/1) ... [2020-07-07 13:24:10,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:24:10,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:24:10,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:24:10,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:24:10,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (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 [2020-07-07 13:24:10,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:24:10,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:24:10,700 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-07 13:24:10,700 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:24:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:24:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-07 13:24:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:24:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:24:10,961 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:24:10,961 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:24:10,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:10 BoogieIcfgContainer [2020-07-07 13:24:10,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:24:10,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:24:10,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:24:10,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:24:10,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:24:10" (1/3) ... [2020-07-07 13:24:10,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38b189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:10, skipping insertion in model container [2020-07-07 13:24:10,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:24:10" (2/3) ... [2020-07-07 13:24:10,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38b189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:24:10, skipping insertion in model container [2020-07-07 13:24:10,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:24:10" (3/3) ... [2020-07-07 13:24:10,978 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-07-07 13:24:10,992 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:24:11,001 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:24:11,021 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:24:11,048 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:24:11,048 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:24:11,049 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:24:11,049 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:24:11,049 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:24:11,049 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:24:11,050 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:24:11,050 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:24:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-07 13:24:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-07 13:24:11,081 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:11,082 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] [2020-07-07 13:24:11,082 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-07-07 13:24:11,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:11,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110156707] [2020-07-07 13:24:11,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:24:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:24:11,617 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:11,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110156707] [2020-07-07 13:24:11,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:24:11,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 13:24:11,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279633547] [2020-07-07 13:24:11,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 13:24:11,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:24:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 13:24:11,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:24:11,647 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 10 states. [2020-07-07 13:24:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:24:12,150 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-07-07 13:24:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 13:24:12,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-07-07 13:24:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:24:12,163 INFO L225 Difference]: With dead ends: 71 [2020-07-07 13:24:12,164 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 13:24:12,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-07-07 13:24:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 13:24:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-07 13:24:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-07 13:24:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-07-07 13:24:12,220 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-07-07 13:24:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:24:12,221 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-07-07 13:24:12,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 13:24:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-07-07 13:24:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 13:24:12,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:24:12,223 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] [2020-07-07 13:24:12,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:24:12,223 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:24:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:24:12,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-07-07 13:24:12,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:24:12,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194255377] [2020-07-07 13:24:12,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:24:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:24:12,320 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:24:12,321 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:24:12,321 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:24:12,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:24:12,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:24:12 BoogieIcfgContainer [2020-07-07 13:24:12,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:24:12,353 INFO L168 Benchmark]: Toolchain (without parser) took 2253.39 ms. Allocated memory was 137.9 MB in the beginning and 234.9 MB in the end (delta: 97.0 MB). Free memory was 101.8 MB in the beginning and 185.1 MB in the end (delta: -83.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:12,356 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 13:24:12,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.53 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:12,360 INFO L168 Benchmark]: Boogie Preprocessor took 203.57 ms. Allocated memory was 137.9 MB in the beginning and 205.5 MB in the end (delta: 67.6 MB). Free memory was 91.8 MB in the beginning and 183.7 MB in the end (delta: -91.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:12,361 INFO L168 Benchmark]: RCFGBuilder took 348.96 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 167.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:12,363 INFO L168 Benchmark]: TraceAbstraction took 1378.82 ms. Allocated memory was 205.5 MB in the beginning and 234.9 MB in the end (delta: 29.4 MB). Free memory was 166.4 MB in the beginning and 185.1 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-07 13:24:12,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.53 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 91.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 203.57 ms. Allocated memory was 137.9 MB in the beginning and 205.5 MB in the end (delta: 67.6 MB). Free memory was 91.8 MB in the beginning and 183.7 MB in the end (delta: -91.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.96 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 167.0 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1378.82 ms. Allocated memory was 205.5 MB in the beginning and 234.9 MB in the end (delta: 29.4 MB). Free memory was 166.4 MB in the beginning and 185.1 MB in the end (delta: -18.8 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int a, b; [L5] int *p1, *p2; [L19] p1 = &a [L20] p2 = &b [L22] b = 1 [L23] a = 5 [L25] EXPR \read(a) [L25] a-- [L27] CALL, EXPR f() [L8] EXPR \read(*p1) [L8] EXPR \read(*p2) [L8] EXPR \read(a) [L8] int v = *p1 + *p2 - a; [L9] COND TRUE v == 1 [L10] p1 = p2 [L11] return v; [L27] RET, EXPR f() [L27] a = f() [L29] EXPR \read(a) [L29] COND TRUE a && p1 == p2 [L36] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 160 SDslu, 84 SDs, 0 SdLazy, 120 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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...