/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/css2003.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:58:27,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:58:27,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:58:27,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:58:27,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:58:27,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:58:27,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:58:27,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:58:27,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:58:27,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:58:27,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:58:27,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:58:27,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:58:27,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:58:27,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:58:27,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:58:27,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:58:27,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:58:27,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:58:27,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:58:27,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:58:27,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:58:27,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:58:27,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:58:27,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:58:27,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:58:27,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:58:27,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:58:27,246 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 16:58:27,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:58:27,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:58:27,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:58:27,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:58:27,262 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:58:27,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:58:27,262 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:58:27,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:58:27,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:58:27,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:58:27,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:58:27,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:58:27,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:58:27,263 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:58:27,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:58:27,264 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:58:27,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:58:27,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:58:27,264 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:58:27,264 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:58:27,265 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:58:27,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:58:27,265 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:58:27,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:58:27,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:58:27,266 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:58:27,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:27,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:58:27,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:58:27,266 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:58:27,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:58:27,555 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:58:27,558 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:58:27,560 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:58:27,562 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:58:27,563 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/css2003.i [2020-07-21 16:58:27,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f022f86f/cd521dbc0ea4492a8ddf957e6d933689/FLAG643e66870 [2020-07-21 16:58:28,057 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:58:28,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/css2003.i [2020-07-21 16:58:28,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f022f86f/cd521dbc0ea4492a8ddf957e6d933689/FLAG643e66870 [2020-07-21 16:58:28,457 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f022f86f/cd521dbc0ea4492a8ddf957e6d933689 [2020-07-21 16:58:28,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:58:28,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:58:28,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:58:28,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:58:28,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:58:28,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75b85af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28, skipping insertion in model container [2020-07-21 16:58:28,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:58:28,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:58:28,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:58:28,716 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:58:28,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:58:28,752 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:58:28,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28 WrapperNode [2020-07-21 16:58:28,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:58:28,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:58:28,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:58:28,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:58:28,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (1/1) ... [2020-07-21 16:58:28,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:58:28,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:58:28,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:58:28,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:58:28,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (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 16:58:28,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:58:28,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:58:28,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:58:28,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:58:28,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:58:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:58:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:58:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:58:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:58:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:58:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:58:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:58:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:58:29,081 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:58:29,081 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:58:29,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:58:29 BoogieIcfgContainer [2020-07-21 16:58:29,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:58:29,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:58:29,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:58:29,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:58:29,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:58:28" (1/3) ... [2020-07-21 16:58:29,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9332335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:58:29, skipping insertion in model container [2020-07-21 16:58:29,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:58:28" (2/3) ... [2020-07-21 16:58:29,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9332335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:58:29, skipping insertion in model container [2020-07-21 16:58:29,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:58:29" (3/3) ... [2020-07-21 16:58:29,118 INFO L109 eAbstractionObserver]: Analyzing ICFG css2003.i [2020-07-21 16:58:29,149 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:58:29,159 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:58:29,185 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:58:29,207 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:58:29,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:58:29,208 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:58:29,208 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:58:29,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:58:29,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:58:29,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:58:29,209 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:58:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 16:58:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 16:58:29,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:29,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:29,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:29,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1610750385, now seen corresponding path program 1 times [2020-07-21 16:58:29,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:29,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411216886] [2020-07-21 16:58:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:58:29,313 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:29,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:29,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 16:58:29,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:29,422 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:58:29,426 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:58:29,461 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 16:58:29,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:58:29,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411216886] [2020-07-21 16:58:29,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:58:29,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:58:29,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791573923] [2020-07-21 16:58:29,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:58:29,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:29,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:58:29,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:58:29,485 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2020-07-21 16:58:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:29,583 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-21 16:58:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:58:29,586 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 16:58:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:29,597 INFO L225 Difference]: With dead ends: 41 [2020-07-21 16:58:29,597 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 16:58:29,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:58:29,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 16:58:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-21 16:58:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 16:58:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 16:58:29,644 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-07-21 16:58:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:29,644 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 16:58:29,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:58:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 16:58:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 16:58:29,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:58:29,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:58:29,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:29,848 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:58:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:58:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1220418797, now seen corresponding path program 1 times [2020-07-21 16:58:29,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:58:29,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893566070] [2020-07-21 16:58:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:58:29,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:58:29,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:58:29,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:58:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:58:29,964 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:58:29,970 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:58:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:58:30,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:58:30,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:58:30,124 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 16:58:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:58:30,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893566070] [2020-07-21 16:58:30,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 16:58:30,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2020-07-21 16:58:30,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655919558] [2020-07-21 16:58:30,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:58:30,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:58:30,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:58:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:58:30,153 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-21 16:58:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:58:30,224 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-07-21 16:58:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:58:30,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 16:58:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:58:30,225 INFO L225 Difference]: With dead ends: 20 [2020-07-21 16:58:30,226 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:58:30,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:58:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:58:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:58:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:58:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:58:30,228 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 16:58:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:58:30,230 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:58:30,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:58:30,230 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:58:30,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:58:30,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:58:30,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:58:30,534 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 16:58:30,534 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:58:30,534 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:58:30,534 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:58:30,535 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:58:30,535 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:58:30,535 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:58:30,535 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 16:58:30,535 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:58:30,536 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 16:58:30,536 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-07-21 16:58:30,536 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-07-21 16:58:30,536 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= .cse0 2) (<= 1 main_~i~0) (<= 1 .cse0))) [2020-07-21 16:58:30,537 INFO L264 CegarLoopResult]: At program point L23-1(lines 19 24) the Hoare annotation is: (let ((.cse0 (+ main_~i~0 main_~k~0))) (and (<= .cse0 2) (<= 1 main_~i~0) (<= 1 .cse0))) [2020-07-21 16:58:30,537 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 16:58:30,537 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 24) no Hoare annotation was computed. [2020-07-21 16:58:30,537 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-07-21 16:58:30,537 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 16:58:30,538 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:58:30,538 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 16:58:30,538 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 16:58:30,538 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 16:58:30,538 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 16:58:30,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:58:30 BoogieIcfgContainer [2020-07-21 16:58:30,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:58:30,558 INFO L168 Benchmark]: Toolchain (without parser) took 2090.57 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 102.9 MB in the beginning and 95.1 MB in the end (delta: 7.8 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:30,559 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:58:30,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.55 ms. Allocated memory is still 146.3 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:30,561 INFO L168 Benchmark]: Boogie Preprocessor took 25.37 ms. Allocated memory is still 146.3 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:30,562 INFO L168 Benchmark]: RCFGBuilder took 305.95 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 171.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:30,563 INFO L168 Benchmark]: TraceAbstraction took 1454.78 ms. Allocated memory is still 203.4 MB. Free memory was 170.4 MB in the beginning and 95.1 MB in the end (delta: 75.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:58:30,567 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.55 ms. Allocated memory is still 146.3 MB. Free memory was 102.7 MB in the beginning and 93.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.37 ms. Allocated memory is still 146.3 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.95 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.7 MB in the beginning and 171.0 MB in the end (delta: -79.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1454.78 ms. Allocated memory is still 203.4 MB. Free memory was 170.4 MB in the beginning and 95.1 MB in the end (delta: 75.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (i + k <= 2 && 1 <= i) && 1 <= i + k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 14 SDslu, 97 SDs, 0 SdLazy, 52 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=1, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 33 HoareAnnotationTreeSize, 9 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 2632 SizeOfPredicates, 5 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...