java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -s ../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-502d2f4 [2018-10-12 20:53:22,798 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-12 20:53:22,800 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-12 20:53:22,818 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-12 20:53:22,886 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/heapseparator/heapsep-2018-09-18.epf [2018-10-12 20:53:22,901 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-12 20:53:22,901 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-12 20:53:22,902 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-12 20:53:22,902 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-10-12 20:53:22,902 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-10-12 20:53:22,902 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-12 20:53:22,903 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-12 20:53:22,903 INFO L133 SettingsManager]: * Size of a code block=SingleStatement [2018-10-12 20:53:22,903 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-12 20:53:22,904 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_TreeInterpolation [2018-10-12 20:53:22,905 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-12 20:53:22,905 INFO L133 SettingsManager]: * Order in Petri net unfolding=Ken McMillan [2018-10-12 20:53:22,905 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-12 20:53:22,906 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-10-12 20:53:22,906 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-10-12 20:53:22,959 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-12 20:53:22,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-12 20:53:22,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-12 20:53:22,983 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-12 20:53:22,984 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-12 20:53:22,985 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl [2018-10-12 20:53:22,985 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl' [2018-10-12 20:53:23,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-12 20:53:23,064 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2018-10-12 20:53:23,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-12 20:53:23,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-12 20:53:23,065 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-12 20:53:23,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/1) ... [2018-10-12 20:53:23,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-12 20:53:23,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-12 20:53:23,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-12 20:53:23,139 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-12 20:53:23,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (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:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-10-12 20:53:23,214 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-12 20:53:23,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-12 20:53:23,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-12 20:53:23,964 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-12 20:53:23,964 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:53:23 BoogieIcfgContainer [2018-10-12 20:53:23,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-12 20:53:23,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-12 20:53:23,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-12 20:53:23,969 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-12 20:53:23,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.10 08:53:23" (1/2) ... [2018-10-12 20:53:23,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b644e30 and model type alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:53:23, skipping insertion in model container [2018-10-12 20:53:23,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:53:23" (2/2) ... [2018-10-12 20:53:23,972 INFO L112 eAbstractionObserver]: Analyzing ICFG alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl [2018-10-12 20:53:23,982 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_TreeInterpolation Determinization: PREDICATE_ABSTRACTION [2018-10-12 20:53:23,989 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-12 20:53:24,001 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-12 20:53:24,027 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-12 20:53:24,028 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-12 20:53:24,028 INFO L383 AbstractCegarLoop]: Hoare is false [2018-10-12 20:53:24,028 INFO L384 AbstractCegarLoop]: Compute interpolants for Craig_TreeInterpolation [2018-10-12 20:53:24,028 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-12 20:53:24,029 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-12 20:53:24,029 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-12 20:53:24,029 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-12 20:53:24,029 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-12 20:53:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2018-10-12 20:53:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-12 20:53:24,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:53:24,058 INFO L375 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] [2018-10-12 20:53:24,059 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:53:24,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:53:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2104171766, now seen corresponding path program 1 times [2018-10-12 20:53:24,114 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:53:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:53:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:53:24,767 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:53:24,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2018-10-12 20:53:24,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-12 20:53:24,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-12 20:53:24,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-10-12 20:53:24,792 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 9 states. [2018-10-12 20:53:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:53:25,838 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-12 20:53:25,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-12 20:53:25,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-12 20:53:25,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:53:25,855 INFO L225 Difference]: With dead ends: 128 [2018-10-12 20:53:25,855 INFO L226 Difference]: Without dead ends: 114 [2018-10-12 20:53:25,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2018-10-12 20:53:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-12 20:53:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2018-10-12 20:53:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-12 20:53:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-12 20:53:25,905 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 37 [2018-10-12 20:53:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:53:25,905 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-12 20:53:25,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-12 20:53:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-12 20:53:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-12 20:53:25,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:53:25,910 INFO L375 BasicCegarLoop]: trace histogram [2, 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, 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] [2018-10-12 20:53:25,912 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:53:25,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:53:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1169949794, now seen corresponding path program 1 times [2018-10-12 20:53:25,914 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:53:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:53:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:53:26,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:53:26,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-12 20:53:26,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-12 20:53:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-12 20:53:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2018-10-12 20:53:26,572 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 11 states. [2018-10-12 20:53:27,021 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-12 20:53:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:53:27,915 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2018-10-12 20:53:27,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-12 20:53:27,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 80 [2018-10-12 20:53:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:53:27,921 INFO L225 Difference]: With dead ends: 197 [2018-10-12 20:53:27,921 INFO L226 Difference]: Without dead ends: 183 [2018-10-12 20:53:27,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2018-10-12 20:53:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-12 20:53:27,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2018-10-12 20:53:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-12 20:53:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2018-10-12 20:53:27,941 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 80 [2018-10-12 20:53:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:53:27,942 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2018-10-12 20:53:27,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-12 20:53:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2018-10-12 20:53:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-12 20:53:27,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:53:27,947 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-12 20:53:27,948 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:53:27,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:53:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash -96652938, now seen corresponding path program 2 times [2018-10-12 20:53:27,949 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:53:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:53:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:53:28,099 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-12 20:53:28,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-12 20:53:28,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-12 20:53:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-12 20:53:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-12 20:53:28,101 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 3 states. [2018-10-12 20:53:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:53:28,178 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-10-12 20:53:28,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-12 20:53:28,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2018-10-12 20:53:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:53:28,186 INFO L225 Difference]: With dead ends: 219 [2018-10-12 20:53:28,186 INFO L226 Difference]: Without dead ends: 219 [2018-10-12 20:53:28,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-12 20:53:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-12 20:53:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-10-12 20:53:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-12 20:53:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2018-10-12 20:53:28,222 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 123 [2018-10-12 20:53:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:53:28,222 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2018-10-12 20:53:28,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-12 20:53:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2018-10-12 20:53:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-12 20:53:28,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:53:28,228 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2018-10-12 20:53:28,228 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:53:28,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:53:28,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1416920726, now seen corresponding path program 1 times [2018-10-12 20:53:28,230 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:53:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:53:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:53:28,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:53:28,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-12 20:53:28,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-12 20:53:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-12 20:53:28,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-10-12 20:53:28,838 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand 16 states. [2018-10-12 20:53:30,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:53:30,596 INFO L93 Difference]: Finished difference Result 338 states and 344 transitions. [2018-10-12 20:53:30,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-12 20:53:30,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2018-10-12 20:53:30,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:53:30,600 INFO L225 Difference]: With dead ends: 338 [2018-10-12 20:53:30,600 INFO L226 Difference]: Without dead ends: 324 [2018-10-12 20:53:30,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=927, Unknown=0, NotChecked=0, Total=1190 [2018-10-12 20:53:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-10-12 20:53:30,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 294. [2018-10-12 20:53:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-12 20:53:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 298 transitions. [2018-10-12 20:53:30,621 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 298 transitions. Word has length 123 [2018-10-12 20:53:30,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:53:30,622 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 298 transitions. [2018-10-12 20:53:30,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-12 20:53:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 298 transitions. [2018-10-12 20:53:30,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-12 20:53:30,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-12 20:53:30,626 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-12 20:53:30,626 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-12 20:53:30,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-12 20:53:30,627 INFO L82 PathProgramCache]: Analyzing trace with hash 717348546, now seen corresponding path program 2 times [2018-10-12 20:53:30,627 INFO L69 tionRefinementEngine]: Using refinement strategy FixedRefinementStrategy [2018-10-12 20:53:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-12 20:53:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 23 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-12 20:53:31,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-12 20:53:31,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-12 20:53:31,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-12 20:53:31,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-12 20:53:31,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2018-10-12 20:53:31,516 INFO L87 Difference]: Start difference. First operand 294 states and 298 transitions. Second operand 22 states. [2018-10-12 20:53:31,861 WARN L178 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-10-12 20:53:34,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-12 20:53:34,156 INFO L93 Difference]: Finished difference Result 313 states and 318 transitions. [2018-10-12 20:53:34,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-12 20:53:34,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 166 [2018-10-12 20:53:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-12 20:53:34,157 INFO L225 Difference]: With dead ends: 313 [2018-10-12 20:53:34,157 INFO L226 Difference]: Without dead ends: 0 [2018-10-12 20:53:34,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=487, Invalid=2165, Unknown=0, NotChecked=0, Total=2652 [2018-10-12 20:53:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-12 20:53:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-12 20:53:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-12 20:53:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-12 20:53:34,160 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2018-10-12 20:53:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-12 20:53:34,160 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-12 20:53:34,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-12 20:53:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-12 20:53:34,161 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-12 20:53:34,166 INFO L202 PluginConnector]: Adding new model alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 08:53:34 BoogieIcfgContainer [2018-10-12 20:53:34,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-12 20:53:34,167 INFO L168 Benchmark]: Toolchain (without parser) took 11104.06 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 22.0 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 339.7 MB). Peak memory consumption was 361.7 MB. Max. memory is 7.1 GB. [2018-10-12 20:53:34,168 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-12 20:53:34,169 INFO L168 Benchmark]: Boogie Preprocessor took 73.47 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-12 20:53:34,170 INFO L168 Benchmark]: RCFGBuilder took 826.16 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. [2018-10-12 20:53:34,171 INFO L168 Benchmark]: TraceAbstraction took 10200.70 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 22.0 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 308.0 MB). Peak memory consumption was 330.0 MB. Max. memory is 7.1 GB. [2018-10-12 20:53:34,175 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 73.47 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 826.16 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10200.70 ms. Allocated memory was 1.6 GB in the beginning and 1.6 GB in the end (delta: 22.0 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 308.0 MB). Peak memory consumption was 330.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 122]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 90 locations, 1 error locations. SAFE Result, 10.1s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 6.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 514 SDtfs, 3096 SDslu, 2616 SDs, 0 SdLazy, 1729 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=294occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 106 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 529 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 524 ConstructedInterpolants, 0 QuantifiedInterpolants, 520878 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 70/204 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-Benchmark-0-2018-10-12_20-53-34-186.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/alternating_list_true-unreach-call_true-valid-memsafety.i_28.bpl_heapsep-2018-09-18.epf_AutomizerBpl.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-12_20-53-34-186.csv Received shutdown request...