/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/test07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:21:33,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:21:33,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:21:33,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:21:34,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:21:34,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:21:34,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:21:34,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:21:34,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:21:34,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:21:34,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:21:34,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:21:34,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:21:34,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:21:34,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:21:34,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:21:34,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:21:34,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:21:34,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:21:34,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:21:34,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:21:34,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:21:34,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:21:34,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:21:34,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:21:34,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:21:34,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:21:34,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:21:34,086 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 11:21:34,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:21:34,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:21:34,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:21:34,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:21:34,134 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:21:34,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:21:34,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:21:34,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:21:34,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:21:34,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:21:34,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:21:34,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:21:34,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:21:34,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:21:34,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:21:34,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:21:34,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:21:34,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:21:34,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:21:34,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:21:34,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:21:34,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:21:34,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:21:34,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:21:34,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:21:34,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:21:34,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:34,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:21:34,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:21:34,144 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 11:21:34,456 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:21:34,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:21:34,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:21:34,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:21:34,476 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:21:34,477 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test07.c [2020-07-21 11:21:34,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b62a6c5d3/50894c5ab3c34206b003d3e74acc4a43/FLAGca4b86814 [2020-07-21 11:21:35,109 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:21:35,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test07.c [2020-07-21 11:21:35,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b62a6c5d3/50894c5ab3c34206b003d3e74acc4a43/FLAGca4b86814 [2020-07-21 11:21:35,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b62a6c5d3/50894c5ab3c34206b003d3e74acc4a43 [2020-07-21 11:21:35,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:21:35,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:21:35,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:35,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:21:35,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:21:35,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1542a85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35, skipping insertion in model container [2020-07-21 11:21:35,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:21:35,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:21:35,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:35,717 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:21:35,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:21:35,753 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:21:35,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35 WrapperNode [2020-07-21 11:21:35,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:21:35,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:21:35,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:21:35,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:21:35,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (1/1) ... [2020-07-21 11:21:35,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:21:35,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:21:35,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:21:35,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:21:35,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (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 11:21:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:21:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:21:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-21 11:21:36,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:21:36,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:21:36,005 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-21 11:21:36,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:21:36,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:21:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:21:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:21:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:21:36,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 11:21:36,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:21:36,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:21:36,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:21:36,272 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:21:36,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:36 BoogieIcfgContainer [2020-07-21 11:21:36,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:21:36,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:21:36,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:21:36,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:21:36,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:21:35" (1/3) ... [2020-07-21 11:21:36,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4122b2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:36, skipping insertion in model container [2020-07-21 11:21:36,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:21:35" (2/3) ... [2020-07-21 11:21:36,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4122b2ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:21:36, skipping insertion in model container [2020-07-21 11:21:36,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:21:36" (3/3) ... [2020-07-21 11:21:36,289 INFO L109 eAbstractionObserver]: Analyzing ICFG test07.c [2020-07-21 11:21:36,302 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:21:36,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:21:36,333 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:21:36,369 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:21:36,369 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:21:36,369 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:21:36,370 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:21:36,370 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:21:36,371 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:21:36,371 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:21:36,371 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:21:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 11:21:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:21:36,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:36,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:36,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:36,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2020-07-21 11:21:36,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:36,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669877321] [2020-07-21 11:21:36,442 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 11:21:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:36,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 11:21:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:36,767 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 11:21:36,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:36,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669877321] [2020-07-21 11:21:36,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:36,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:21:36,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161235439] [2020-07-21 11:21:36,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:21:36,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:36,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:21:36,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:21:36,794 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-21 11:21:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:36,902 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-07-21 11:21:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:21:36,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 11:21:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:36,915 INFO L225 Difference]: With dead ends: 29 [2020-07-21 11:21:36,916 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 11:21:36,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:21:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 11:21:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 11:21:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 11:21:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-07-21 11:21:36,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2020-07-21 11:21:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:36,970 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-07-21 11:21:36,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:21:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-07-21 11:21:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:21:36,971 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:21:36,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:21:37,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:37,187 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:21:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:21:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2020-07-21 11:21:37,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:21:37,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71737009] [2020-07-21 11:21:37,189 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 11:21:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:21:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 11:21:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:21:37,385 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2020-07-21 11:21:37,392 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 11:21:37,436 INFO L624 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2020-07-21 11:21:37,437 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:21:37,439 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2020-07-21 11:21:37,495 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-21 11:21:37,496 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:21:37,533 INFO L624 ElimStorePlain]: treesize reduction 4, result has 87.1 percent of original size [2020-07-21 11:21:37,534 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:21:37,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:27 [2020-07-21 11:21:37,734 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 11:21:37,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:21:37,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71737009] [2020-07-21 11:21:37,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:37,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:21:37,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158199350] [2020-07-21 11:21:37,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:21:37,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:21:37,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:21:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:21:37,745 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 7 states. [2020-07-21 11:21:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:21:37,941 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-07-21 11:21:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:21:37,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 11:21:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:21:37,943 INFO L225 Difference]: With dead ends: 15 [2020-07-21 11:21:37,943 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:21:37,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:21:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:21:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:21:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:21:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:21:37,946 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-21 11:21:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:21:37,947 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:21:37,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:21:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:21:37,947 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:21:38,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:38,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:21:38,430 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:38,431 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:38,431 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:38,431 INFO L268 CegarLoopResult]: For program point L9(lines 9 14) no Hoare annotation was computed. [2020-07-21 11:21:38,432 INFO L268 CegarLoopResult]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 11:21:38,432 INFO L264 CegarLoopResult]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (not (= 0 ~p2~0.offset)) (not (= 0 |~#a~0.offset|)) (not (= 4 (select (select |#memory_int| |~#a~0.base|) |~#a~0.offset|))) (= |~#b~0.base| |~#a~0.base|) (not (= 0 |~#b~0.offset|)) (not (= |old(~p1~0.base)| |~#a~0.base|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |~#a~0.base| ~p1~0.base)) (not (= 1 (select (select |#memory_int| ~p2~0.base) 0))) (not (= |old(~p1~0.offset)| |~#a~0.offset|))) [2020-07-21 11:21:38,432 INFO L268 CegarLoopResult]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 11:21:38,432 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:21:38,433 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= 0 |~#b~0.offset|) (= 0 |~#a~0.offset|) (not (= |~#b~0.base| |~#a~0.base|))) [2020-07-21 11:21:38,433 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:21:38,433 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:21:38,433 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 35) no Hoare annotation was computed. [2020-07-21 11:21:38,434 INFO L264 CegarLoopResult]: At program point L30(lines 17 37) the Hoare annotation is: (or (not (= 0 |~#b~0.offset|)) (= |~#a~0.base| |~#b~0.base|) (not (= 0 |~#a~0.offset|))) [2020-07-21 11:21:38,434 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 37) the Hoare annotation is: true [2020-07-21 11:21:38,434 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-07-21 11:21:38,434 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2020-07-21 11:21:38,434 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (or (and (= ~p1~0.offset |~#a~0.offset|) (= 0 ~p2~0.offset) (= 4 (select (select |#memory_int| |~#a~0.base|) |~#a~0.offset|)) (= |~#a~0.base| ~p1~0.base) (= 1 (select (select |#memory_int| ~p2~0.base) 0))) (not (= 0 |~#a~0.offset|)) (= |~#b~0.base| |~#a~0.base|) (not (= 0 |~#b~0.offset|))) [2020-07-21 11:21:38,435 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-21 11:21:38,435 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2020-07-21 11:21:38,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:21:38 BoogieIcfgContainer [2020-07-21 11:21:38,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:21:38,462 INFO L168 Benchmark]: Toolchain (without parser) took 2993.05 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 101.5 MB in the beginning and 169.2 MB in the end (delta: -67.7 MB). Peak memory consumption was 28.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:38,463 INFO L168 Benchmark]: CDTParser took 0.19 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 11:21:38,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.01 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 91.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:38,465 INFO L168 Benchmark]: Boogie Preprocessor took 164.98 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.4 MB in the beginning and 181.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:38,466 INFO L168 Benchmark]: RCFGBuilder took 357.09 ms. Allocated memory is still 202.9 MB. Free memory was 181.1 MB in the beginning and 166.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:38,468 INFO L168 Benchmark]: TraceAbstraction took 2179.52 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 165.9 MB in the beginning and 169.2 MB in the end (delta: -3.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:38,472 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.01 ms. Allocated memory is still 137.9 MB. Free memory was 101.3 MB in the beginning and 91.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.98 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 91.4 MB in the beginning and 181.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 357.09 ms. Allocated memory is still 202.9 MB. Free memory was 181.1 MB in the beginning and 166.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2179.52 ms. Allocated memory was 202.9 MB in the beginning and 234.4 MB in the end (delta: 31.5 MB). Free memory was 165.9 MB in the beginning and 169.2 MB in the end (delta: -3.4 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 35]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (!(0 == b) || a == b) || !(0 == a) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 4 SDslu, 37 SDs, 0 SdLazy, 38 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 109 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 65 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3783 SizeOfPredicates, 20 NumberOfNonLiveVariables, 269 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...