/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:43:04,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:43:04,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:43:04,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:43:04,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:43:04,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:43:04,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:43:04,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:43:04,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:43:04,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:43:04,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:43:04,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:43:04,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:43:04,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:43:04,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:43:04,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:43:04,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:43:04,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:43:04,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:43:04,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:43:04,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:43:04,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:43:04,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:43:04,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:43:04,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:43:04,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:43:04,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:43:04,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:43:04,620 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 [2020-07-19 23:43:04,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:43:04,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:43:04,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:43:04,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:43:04,637 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:43:04,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:43:04,638 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:43:04,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:43:04,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:43:04,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:43:04,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:43:04,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:43:04,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:43:04,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:43:04,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:43:04,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:43:04,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:43:04,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:43:04,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:43:04,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:43:04,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:43:04,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:43:04,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:43:04,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:43:04,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:43:04,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:43:04,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:43:04,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:43:04,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:43:04,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:43:04,909 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:43:04,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:43:04,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:43:04,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:43:04,927 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:43:04,928 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-19 23:43:05,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd65a323/6982aae1034f4c8093e7f5c016b03227/FLAG54a306a0d [2020-07-19 23:43:05,488 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:43:05,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-19 23:43:05,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd65a323/6982aae1034f4c8093e7f5c016b03227/FLAG54a306a0d [2020-07-19 23:43:05,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bd65a323/6982aae1034f4c8093e7f5c016b03227 [2020-07-19 23:43:05,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:43:05,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:43:05,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:43:05,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:43:05,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:43:05,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:43:05" (1/1) ... [2020-07-19 23:43:05,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ccdbd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:05, skipping insertion in model container [2020-07-19 23:43:05,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:43:05" (1/1) ... [2020-07-19 23:43:05,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:43:05,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:43:06,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:43:06,144 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:43:06,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:43:06,176 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:43:06,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06 WrapperNode [2020-07-19 23:43:06,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:43:06,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:43:06,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:43:06,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:43:06,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (1/1) ... [2020-07-19 23:43:06,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:43:06,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:43:06,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:43:06,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:43:06,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (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 [2020-07-19 23:43:06,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:43:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:43:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:43:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:43:06,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:43:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:43:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:43:06,352 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:43:06,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:43:06,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:43:06,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:43:06,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:43:06,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:43:06,548 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:43:06,549 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 23:43:06,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:43:06 BoogieIcfgContainer [2020-07-19 23:43:06,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:43:06,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:43:06,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:43:06,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:43:06,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:43:05" (1/3) ... [2020-07-19 23:43:06,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286a92c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:43:06, skipping insertion in model container [2020-07-19 23:43:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:06" (2/3) ... [2020-07-19 23:43:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286a92c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:43:06, skipping insertion in model container [2020-07-19 23:43:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:43:06" (3/3) ... [2020-07-19 23:43:06,561 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-07-19 23:43:06,572 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:43:06,579 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:43:06,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:43:06,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:43:06,670 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:43:06,670 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:43:06,671 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:43:06,671 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:43:06,671 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:43:06,671 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:43:06,671 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:43:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-19 23:43:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-19 23:43:06,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:06,710 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:06,711 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash 292259706, now seen corresponding path program 1 times [2020-07-19 23:43:06,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:06,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406766622] [2020-07-19 23:43:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7663a576 [2020-07-19 23:43:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:06,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406766622] [2020-07-19 23:43:06,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:43:06,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:43:06,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104902028] [2020-07-19 23:43:06,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:43:06,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:43:06,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:43:06,959 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-07-19 23:43:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:07,054 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-07-19 23:43:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:43:07,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-19 23:43:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:07,062 INFO L225 Difference]: With dead ends: 43 [2020-07-19 23:43:07,063 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:43:07,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:43:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:43:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:43:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:43:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:43:07,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2020-07-19 23:43:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:07,109 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:43:07,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:43:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:43:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 23:43:07,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:07,111 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:07,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:43:07,111 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1546928273, now seen corresponding path program 1 times [2020-07-19 23:43:07,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:07,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671116704] [2020-07-19 23:43:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7663a576 [2020-07-19 23:43:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:07,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671116704] [2020-07-19 23:43:07,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:43:07,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:43:07,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058339029] [2020-07-19 23:43:07,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:43:07,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:43:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:43:07,201 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-07-19 23:43:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:07,252 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-19 23:43:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:43:07,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-19 23:43:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:07,254 INFO L225 Difference]: With dead ends: 21 [2020-07-19 23:43:07,254 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:43:07,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:43:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:43:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:43:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:43:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:43:07,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-19 23:43:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:07,257 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:43:07,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:43:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:43:07,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:43:07,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:43:07,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:43:07,308 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 23:43:07,309 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:43:07,309 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:43:07,309 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:43:07,309 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:43:07,310 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:43:07,310 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-19 23:43:07,310 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-19 23:43:07,310 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-19 23:43:07,310 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-19 23:43:07,311 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-07-19 23:43:07,311 INFO L268 CegarLoopResult]: For program point L19(lines 17 20) no Hoare annotation was computed. [2020-07-19 23:43:07,311 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 20) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~nlen~0)) [2020-07-19 23:43:07,311 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-07-19 23:43:07,311 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-07-19 23:43:07,312 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~nlen~0)) [2020-07-19 23:43:07,312 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~i~0 1) main_~nlen~0)) [2020-07-19 23:43:07,312 INFO L268 CegarLoopResult]: For program point L16-2(lines 16 21) no Hoare annotation was computed. [2020-07-19 23:43:07,313 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (<= 0 main_~i~0) [2020-07-19 23:43:07,313 INFO L268 CegarLoopResult]: For program point L16-4(lines 16 21) no Hoare annotation was computed. [2020-07-19 23:43:07,313 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-19 23:43:07,313 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-19 23:43:07,313 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-19 23:43:07,314 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-19 23:43:07,314 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-19 23:43:07,314 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-19 23:43:07,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:43:07 BoogieIcfgContainer [2020-07-19 23:43:07,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:43:07,335 INFO L168 Benchmark]: Toolchain (without parser) took 1469.05 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 100.4 MB in the beginning and 122.6 MB in the end (delta: -22.2 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:07,336 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-19 23:43:07,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.34 ms. Allocated memory is still 135.8 MB. Free memory was 100.0 MB in the beginning and 90.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:07,338 INFO L168 Benchmark]: Boogie Preprocessor took 108.40 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 179.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:07,339 INFO L168 Benchmark]: RCFGBuilder took 266.74 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 165.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:07,340 INFO L168 Benchmark]: TraceAbstraction took 777.55 ms. Allocated memory is still 199.2 MB. Free memory was 164.6 MB in the beginning and 122.6 MB in the end (delta: 42.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:07,345 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 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 310.34 ms. Allocated memory is still 135.8 MB. Free memory was 100.0 MB in the beginning and 90.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.40 ms. Allocated memory was 135.8 MB in the beginning and 199.2 MB in the end (delta: 63.4 MB). Free memory was 90.5 MB in the beginning and 179.3 MB in the end (delta: -88.7 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 266.74 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 165.3 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 777.55 ms. Allocated memory is still 199.2 MB. Free memory was 164.6 MB in the beginning and 122.6 MB in the end (delta: 42.0 MB). Peak memory consumption was 42.0 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: 16]: Loop Invariant Derived loop invariant: 0 <= i - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 <= i && i + 1 <= nlen - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 14 SDslu, 82 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 9 LocationsWithAnnotation, 12 PreInvPairs, 16 NumberOfFragments, 35 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 675 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 2/2 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...