/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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:40:40,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:40:40,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:40:40,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:40:40,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:40:40,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:40:40,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:40:40,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:40:40,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:40:40,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:40:40,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:40:40,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:40:40,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:40:40,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:40:40,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:40:40,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:40:40,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:40:40,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:40:40,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:40:40,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:40:40,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:40:40,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:40:40,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:40:40,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:40:40,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:40:40,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:40:40,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:40:40,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:40:40,607 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 16:40:40,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:40:40,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:40:40,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:40:40,643 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:40:40,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:40:40,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:40:40,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:40:40,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:40:40,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:40:40,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:40:40,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:40:40,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:40:40,646 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:40:40,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:40:40,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:40:40,648 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:40:40,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:40:40,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:40:40,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:40:40,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:40:40,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:40:40,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:40:40,649 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:40:41,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:40:41,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:40:41,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:40:41,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:40:41,123 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:40:41,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-09-04 16:40:41,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a6c6c18f/e4f113b573fc4c67949af62d6f91ab8e/FLAG58e57c655 [2020-09-04 16:40:41,737 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:40:41,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-09-04 16:40:41,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a6c6c18f/e4f113b573fc4c67949af62d6f91ab8e/FLAG58e57c655 [2020-09-04 16:40:42,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a6c6c18f/e4f113b573fc4c67949af62d6f91ab8e [2020-09-04 16:40:42,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:40:42,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:40:42,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:42,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:40:42,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:40:42,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718a405b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42, skipping insertion in model container [2020-09-04 16:40:42,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:40:42,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:40:42,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:42,455 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:40:42,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:40:42,488 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:40:42,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42 WrapperNode [2020-09-04 16:40:42,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:40:42,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:40:42,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:40:42,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:40:42,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (1/1) ... [2020-09-04 16:40:42,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:40:42,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:40:42,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:40:42,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:40:42,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (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 16:40:42,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:40:42,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:40:42,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:40:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:40:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:40:42,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:40:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:40:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:40:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:40:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:40:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:40:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:40:42,955 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:40:42,956 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:40:42,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:42 BoogieIcfgContainer [2020-09-04 16:40:42,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:40:42,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:40:42,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:40:42,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:40:42,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:40:42" (1/3) ... [2020-09-04 16:40:42,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f780279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:42, skipping insertion in model container [2020-09-04 16:40:42,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:40:42" (2/3) ... [2020-09-04 16:40:42,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f780279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:40:42, skipping insertion in model container [2020-09-04 16:40:42,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:40:42" (3/3) ... [2020-09-04 16:40:42,973 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-09-04 16:40:42,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:40:42,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:40:43,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:40:43,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:40:43,058 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:40:43,058 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:40:43,058 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:40:43,058 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:40:43,059 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:40:43,059 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:40:43,059 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:40:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-04 16:40:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 16:40:43,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:43,099 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] [2020-09-04 16:40:43,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:43,108 INFO L82 PathProgramCache]: Analyzing trace with hash -374520961, now seen corresponding path program 1 times [2020-09-04 16:40:43,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:43,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542022647] [2020-09-04 16:40:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:43,198 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:43,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:40:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:40:43,387 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 16:40:43,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542022647] [2020-09-04 16:40:43,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:40:43,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:40:43,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6964416] [2020-09-04 16:40:43,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:40:43,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:40:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:40:43,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:40:43,414 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-09-04 16:40:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:40:43,576 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-09-04 16:40:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:40:43,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-04 16:40:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:40:43,592 INFO L225 Difference]: With dead ends: 54 [2020-09-04 16:40:43,592 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 16:40:43,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:40:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 16:40:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-04 16:40:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-04 16:40:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-09-04 16:40:43,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-09-04 16:40:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:40:43,642 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-09-04 16:40:43,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:40:43,642 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-09-04 16:40:43,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 16:40:43,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:40:43,644 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] [2020-09-04 16:40:43,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:40:43,644 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:40:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:40:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1400624444, now seen corresponding path program 1 times [2020-09-04 16:40:43,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:40:43,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081359434] [2020-09-04 16:40:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:40:43,648 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:40:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:40:43,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:40:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:40:43,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:40:43,733 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:40:43,733 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:40:43,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:40:43,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:40:43 BoogieIcfgContainer [2020-09-04 16:40:43,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:40:43,760 INFO L168 Benchmark]: Toolchain (without parser) took 1625.19 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.1 MB in the beginning and 126.3 MB in the end (delta: -24.2 MB). Peak memory consumption was 38.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:43,761 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:40:43,762 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.72 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:43,763 INFO L168 Benchmark]: Boogie Preprocessor took 113.87 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:43,764 INFO L168 Benchmark]: RCFGBuilder took 358.04 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 163.8 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:43,765 INFO L168 Benchmark]: TraceAbstraction took 793.10 ms. Allocated memory is still 201.9 MB. Free memory was 163.8 MB in the beginning and 126.9 MB in the end (delta: 36.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:40:43,769 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.72 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.87 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.04 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 163.8 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 793.10 ms. Allocated memory is still 201.9 MB. Free memory was 163.8 MB in the beginning and 126.9 MB in the end (delta: 36.8 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L13] int n = __VERIFIER_nondet_int(); [L14] EXPR n ? &d1 : &d2 [L14] struct dummy *pd = n ? &d1 : &d2; [L15] COND TRUE pd == &d2 [L16] pd->a = 0 [L20] pd == &d2 && d2.b != 0 [L20] EXPR d2.b [L20] pd == &d2 && d2.b != 0 [L20] COND TRUE pd == &d2 && d2.b != 0 [L26] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 1 SDslu, 38 SDs, 0 SdLazy, 44 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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...