/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 0.1.25-3af5e1f [2020-09-04 16:40:16,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:40:16,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:40:16,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:40:16,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:40:16,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:40:16,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:40:16,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:40:16,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:40:16,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:40:16,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:40:16,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:40:16,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:40:16,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:40:16,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:40:16,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:40:16,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:40:16,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:40:16,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:40:16,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:40:16,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:40:16,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:40:16,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:40:16,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:40:16,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:40:16,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:40:16,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:40:16,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:40:16,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:40:16,177 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:40:16,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:40:16,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:40:16,182 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:40:16,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:40:16,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:40:16,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:40:16,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:40:16,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:40:16,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:40:16,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:40:16,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:40:16,185 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:40:16,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:40:16,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:40:16,187 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:40:16,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:40:16,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:40:16,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:40:16,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:40:16,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:40:16,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:40:16,188 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:40:16,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:40:16,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:40:16,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:40:16,708 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:40:16,709 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:40:16,711 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-09-04 16:40:16,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bd385958/65f7ddf21cbc4730ac3b3e4571bb8bf4/FLAG0cb3495a3 [2020-09-04 16:40:17,461 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:40:17,464 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test08.c [2020-09-04 16:40:17,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bd385958/65f7ddf21cbc4730ac3b3e4571bb8bf4/FLAG0cb3495a3 [2020-09-04 16:40:17,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bd385958/65f7ddf21cbc4730ac3b3e4571bb8bf4 [2020-09-04 16:40:17,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:40:17,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:40:17,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:17,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:40:17,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:40:17,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:17" (1/1) ... [2020-09-04 16:40:17,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53446a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:17, skipping insertion in model container [2020-09-04 16:40:17,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:17" (1/1) ... [2020-09-04 16:40:17,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:40:17,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:40:18,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:18,129 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:40:18,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:18,167 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:40:18,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18 WrapperNode [2020-09-04 16:40:18,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:18,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:40:18,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:40:18,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:40:18,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... [2020-09-04 16:40:18,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:40:18,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:40:18,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:40:18,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:40:18,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:40:18,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:40:18,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:40:18,398 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-04 16:40:18,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:40:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:40:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-04 16:40:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:40:18,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:40:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:40:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:40:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:40:18,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-04 16:40:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:40:18,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:40:18,741 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:40:18,742 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:40:18,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:18 BoogieIcfgContainer [2020-09-04 16:40:18,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:40:18,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:40:18,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:40:18,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:40:18,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:40:17" (1/3) ... [2020-09-04 16:40:18,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9dc2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:18, skipping insertion in model container [2020-09-04 16:40:18,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:18" (2/3) ... [2020-09-04 16:40:18,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9dc2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:18, skipping insertion in model container [2020-09-04 16:40:18,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:18" (3/3) ... [2020-09-04 16:40:18,764 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-09-04 16:40:18,780 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:40:18,793 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:40:18,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:40:18,885 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:40:18,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:40:18,885 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:40:18,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:40:18,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:40:18,886 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:40:18,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:40:18,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:40:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-04 16:40:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 16:40:18,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:18,929 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] [2020-09-04 16:40:18,930 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:18,940 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-09-04 16:40:18,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:18,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408631370] [2020-09-04 16:40:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:19,034 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:19,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-04 16:40:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:40:19,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408631370] [2020-09-04 16:40:19,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:19,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:40:19,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181517222] [2020-09-04 16:40:19,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:40:19,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:19,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:40:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:40:19,620 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 9 states. [2020-09-04 16:40:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:20,258 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-04 16:40:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 16:40:20,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-09-04 16:40:20,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:20,278 INFO L225 Difference]: With dead ends: 71 [2020-09-04 16:40:20,278 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 16:40:20,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:40:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 16:40:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-04 16:40:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-04 16:40:20,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-09-04 16:40:20,357 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-09-04 16:40:20,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:20,358 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-09-04 16:40:20,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:40:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-09-04 16:40:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 16:40:20,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:20,361 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] [2020-09-04 16:40:20,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:40:20,361 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:20,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-09-04 16:40:20,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:20,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72874443] [2020-09-04 16:40:20,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:20,365 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:40:20,404 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:40:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:40:20,441 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:40:20,501 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:40:20,502 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:40:20,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:40:20,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:40:20 BoogieIcfgContainer [2020-09-04 16:40:20,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:40:20,540 INFO L168 Benchmark]: Toolchain (without parser) took 2724.29 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 101.3 MB in the beginning and 187.3 MB in the end (delta: -86.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:20,541 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-04 16:40:20,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.45 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 91.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:20,543 INFO L168 Benchmark]: Boogie Preprocessor took 143.22 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:20,544 INFO L168 Benchmark]: RCFGBuilder took 437.82 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 163.9 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:20,545 INFO L168 Benchmark]: TraceAbstraction took 1783.53 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 163.2 MB in the beginning and 187.3 MB in the end (delta: -24.1 MB). Peak memory consumption was 7.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:20,550 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 351.45 ms. Allocated memory is still 138.4 MB. Free memory was 100.8 MB in the beginning and 91.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.22 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 91.2 MB in the beginning and 180.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 437.82 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 163.9 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1783.53 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 163.2 MB in the beginning and 187.3 MB in the end (delta: -24.1 MB). Peak memory consumption was 7.9 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: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 149 SDslu, 78 SDs, 0 SdLazy, 107 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s 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...