/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:22:37,003 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 11:22:37,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:22:37,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:22:37,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:22:37,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:22:37,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:22:37,071 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:22:37,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:22:37,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:22:37,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:22:37,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:22:37,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:22:37,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:22:37,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:22:37,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:22:37,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:22:37,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:22:37,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:22:37,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:22:37,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:22:37,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:22:37,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:22:37,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:22:37,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:22:37,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:22:37,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:22:37,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:22:37,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:22:37,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:37,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:22:37,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:22:37,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:22:37,367 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:22:37,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:22:37,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:22:37,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:22:37,387 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:22:37,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-07-21 11:22:37,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b060526b2/81d4df3ec82448eb978e08dd99deb168/FLAG6068662f5 [2020-07-21 11:22:37,971 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:22:37,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.c_1.i [2020-07-21 11:22:37,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b060526b2/81d4df3ec82448eb978e08dd99deb168/FLAG6068662f5 [2020-07-21 11:22:38,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b060526b2/81d4df3ec82448eb978e08dd99deb168 [2020-07-21 11:22:38,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:22:38,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:22:38,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:22:38,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:22:38,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:22:38,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41361c51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38, skipping insertion in model container [2020-07-21 11:22:38,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:22:38,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:22:38,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:22:38,547 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:22:38,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:22:38,579 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:22:38,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38 WrapperNode [2020-07-21 11:22:38,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:22:38,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:22:38,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:22:38,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:22:38,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... [2020-07-21 11:22:38,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:22:38,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:22:38,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:22:38,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:22:38,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:22:38,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:22:38,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:22:38,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-21 11:22:38,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:22:38,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:22:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-21 11:22:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:22:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:22:38,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:22:38,918 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:22:38,918 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:22:38,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:22:38 BoogieIcfgContainer [2020-07-21 11:22:38,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:22:38,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:22:38,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:22:38,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:22:38,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:22:38" (1/3) ... [2020-07-21 11:22:38,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b61b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:22:38, skipping insertion in model container [2020-07-21 11:22:38,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:22:38" (2/3) ... [2020-07-21 11:22:38,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b61b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:22:38, skipping insertion in model container [2020-07-21 11:22:38,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:22:38" (3/3) ... [2020-07-21 11:22:38,931 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2020-07-21 11:22:38,942 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:22:38,949 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:22:38,964 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:22:38,989 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:22:38,990 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:22:38,990 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:22:38,990 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:22:38,990 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:22:38,990 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:22:38,990 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:22:38,991 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:22:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 11:22:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-07-21 11:22:39,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:39,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:39,019 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash 676687463, now seen corresponding path program 1 times [2020-07-21 11:22:39,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:39,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279679858] [2020-07-21 11:22:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:22:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:39,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:22:39,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279679858] [2020-07-21 11:22:39,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:22:39,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:22:39,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255837847] [2020-07-21 11:22:39,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:22:39,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:22:39,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:22:39,213 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-07-21 11:22:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:39,275 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-07-21 11:22:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:22:39,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-07-21 11:22:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:39,293 INFO L225 Difference]: With dead ends: 30 [2020-07-21 11:22:39,293 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 11:22:39,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:22:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 11:22:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2020-07-21 11:22:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 11:22:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 11:22:39,337 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2020-07-21 11:22:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:39,338 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 11:22:39,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:22:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 11:22:39,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:22:39,339 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:39,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:39,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:39,555 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1754257002, now seen corresponding path program 1 times [2020-07-21 11:22:39,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:39,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228060543] [2020-07-21 11:22:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:22:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:22:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:22:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:39,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:22:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:22:39,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228060543] [2020-07-21 11:22:39,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:22:39,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-07-21 11:22:39,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967443231] [2020-07-21 11:22:39,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:22:39,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:22:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:22:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:22:39,690 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-07-21 11:22:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:22:39,716 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-21 11:22:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:22:39,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 11:22:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:22:39,718 INFO L225 Difference]: With dead ends: 18 [2020-07-21 11:22:39,718 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 11:22:39,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:22:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 11:22:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-07-21 11:22:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 11:22:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 11:22:39,725 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-07-21 11:22:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:22:39,726 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 11:22:39,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:22:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 11:22:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:22:39,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:22:39,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:22:39,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:39,943 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:22:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:22:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -2083501651, now seen corresponding path program 2 times [2020-07-21 11:22:39,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:22:39,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340617384] [2020-07-21 11:22:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:22:39,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:22:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:22:39,975 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:22:39,987 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:22:39,988 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:22:40,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:22:40,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:22:40 BoogieIcfgContainer [2020-07-21 11:22:40,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:22:40,224 INFO L168 Benchmark]: Toolchain (without parser) took 1877.93 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 129.5 MB in the end (delta: -27.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:40,225 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:22:40,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.54 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 92.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:40,227 INFO L168 Benchmark]: Boogie Preprocessor took 33.01 ms. Allocated memory is still 137.9 MB. Free memory was 92.6 MB in the beginning and 91.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:40,228 INFO L168 Benchmark]: RCFGBuilder took 308.46 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.1 MB in the beginning and 170.6 MB in the end (delta: -79.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:40,229 INFO L168 Benchmark]: TraceAbstraction took 1297.12 ms. Allocated memory is still 201.9 MB. Free memory was 169.9 MB in the beginning and 129.5 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:22:40,234 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.54 ms. Allocated memory is still 137.9 MB. Free memory was 101.6 MB in the beginning and 92.6 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.01 ms. Allocated memory is still 137.9 MB. Free memory was 92.6 MB in the beginning and 91.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.46 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.1 MB in the beginning and 170.6 MB in the end (delta: -79.5 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1297.12 ms. Allocated memory is still 201.9 MB. Free memory was 169.9 MB in the beginning and 129.5 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i=0; VAL [i=0] [L13] COND TRUE i<5 [L14] i++ VAL [i=1] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L13] COND TRUE i<5 [L14] i++ VAL [i=2] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L13] COND TRUE i<5 [L14] i++ VAL [i=3] [L16] (i!=3) ? (0) : __blast_assert () VAL [i=3] [L16] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 3 SDslu, 32 SDs, 0 SdLazy, 20 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 456 SizeOfPredicates, 2 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, 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...