/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.trace.refinement.strategy CAMEL_NO_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 21:46:48,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:46:48,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:46:48,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:46:48,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:46:48,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:46:48,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:46:48,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:46:48,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:46:48,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:46:48,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:46:48,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:46:48,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:46:48,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:46:48,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:46:48,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:46:48,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:46:48,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:46:48,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:46:48,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:46:48,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:46:48,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:46:48,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:46:48,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:46:48,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:46:48,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:46:48,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:46:48,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:46:48,651 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 21:46:48,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:46:48,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:46:48,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:46:48,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:46:48,681 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:46:48,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:46:48,681 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:46:48,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:46:48,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:46:48,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:46:48,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:46:48,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:46:48,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:46:48,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:46:48,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:46:48,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:46:48,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:46:48,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:46:48,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:46:48,686 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:46:48,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:46:48,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:46:48,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:46:48,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:46:48,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:46:48,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:46:48,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:46:48,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:46:48,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:46:48,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:46:49,017 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:46:49,040 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:46:49,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:46:49,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:46:49,051 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:46:49,052 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-19 21:46:49,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08560b9f4/151b57019d44444ebc5e4a962c7670fb/FLAG9c0baf66c [2020-07-19 21:46:49,717 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:46:49,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-07-19 21:46:49,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08560b9f4/151b57019d44444ebc5e4a962c7670fb/FLAG9c0baf66c [2020-07-19 21:46:50,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08560b9f4/151b57019d44444ebc5e4a962c7670fb [2020-07-19 21:46:50,081 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:46:50,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:46:50,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:50,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:46:50,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:46:50,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a36dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50, skipping insertion in model container [2020-07-19 21:46:50,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:46:50,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:46:50,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:50,341 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:46:50,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:46:50,373 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:46:50,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50 WrapperNode [2020-07-19 21:46:50,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:46:50,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:46:50,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:46:50,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:46:50,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (1/1) ... [2020-07-19 21:46:50,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:46:50,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:46:50,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:46:50,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:46:50,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (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 21:46:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:46:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:46:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:46:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:46:50,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:46:50,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:46:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:46:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:46:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:46:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:46:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:46:50,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:46:50,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:46:50,808 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:46:50,808 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 21:46:50,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:50 BoogieIcfgContainer [2020-07-19 21:46:50,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:46:50,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:46:50,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:46:50,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:46:50,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:46:50" (1/3) ... [2020-07-19 21:46:50,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30caa24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:50, skipping insertion in model container [2020-07-19 21:46:50,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:46:50" (2/3) ... [2020-07-19 21:46:50,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30caa24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:46:50, skipping insertion in model container [2020-07-19 21:46:50,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:46:50" (3/3) ... [2020-07-19 21:46:50,852 INFO L109 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-07-19 21:46:50,894 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:46:50,914 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:46:50,959 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:46:50,987 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:46:50,988 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:46:50,988 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:46:50,988 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:46:50,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:46:50,988 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:46:50,989 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:46:50,989 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:46:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-19 21:46:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-19 21:46:51,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:51,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:51,016 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash 292259706, now seen corresponding path program 1 times [2020-07-19 21:46:51,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:51,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476943782] [2020-07-19 21:46:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44a81a83 [2020-07-19 21:46:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,282 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 21:46:51,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476943782] [2020-07-19 21:46:51,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:51,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:46:51,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168739154] [2020-07-19 21:46:51,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:46:51,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:51,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:46:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:51,311 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-07-19 21:46:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:51,419 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2020-07-19 21:46:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:46:51,421 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-19 21:46:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:51,429 INFO L225 Difference]: With dead ends: 43 [2020-07-19 21:46:51,430 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 21:46:51,435 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 21:46:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 21:46:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 21:46:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:46:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 21:46:51,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 11 [2020-07-19 21:46:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:51,491 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 21:46:51,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:46:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 21:46:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-19 21:46:51,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:46:51,493 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:46:51,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:46:51,494 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:46:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:46:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1546928273, now seen corresponding path program 1 times [2020-07-19 21:46:51,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:46:51,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193528664] [2020-07-19 21:46:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44a81a83 [2020-07-19 21:46:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:46:51,600 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 21:46:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193528664] [2020-07-19 21:46:51,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:46:51,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:46:51,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147018036] [2020-07-19 21:46:51,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:46:51,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:46:51,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:46:51,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:46:51,606 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-07-19 21:46:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:46:51,660 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-19 21:46:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:46:51,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-19 21:46:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:46:51,662 INFO L225 Difference]: With dead ends: 21 [2020-07-19 21:46:51,663 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:46:51,665 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 21:46:51,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:46:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:46:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:46:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:46:51,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-19 21:46:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:46:51,667 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:46:51,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:46:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:46:51,668 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:46:51,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:46:51,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:46:51,761 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:46:51,761 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:51,761 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:46:51,762 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:46:51,762 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:46:51,762 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:46:51,762 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:46:51,763 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-19 21:46:51,763 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:46:51,763 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:46:51,763 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 23) no Hoare annotation was computed. [2020-07-19 21:46:51,763 INFO L268 CegarLoopResult]: For program point L19(lines 17 20) no Hoare annotation was computed. [2020-07-19 21:46:51,764 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 21:46:51,764 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 23) no Hoare annotation was computed. [2020-07-19 21:46:51,764 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 23) the Hoare annotation is: true [2020-07-19 21:46:51,765 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 21:46:51,765 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 21:46:51,765 INFO L268 CegarLoopResult]: For program point L16-2(lines 16 21) no Hoare annotation was computed. [2020-07-19 21:46:51,766 INFO L264 CegarLoopResult]: At program point L16-3(lines 16 21) the Hoare annotation is: (<= 0 main_~i~0) [2020-07-19 21:46:51,766 INFO L268 CegarLoopResult]: For program point L16-4(lines 16 21) no Hoare annotation was computed. [2020-07-19 21:46:51,766 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-19 21:46:51,766 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-19 21:46:51,767 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-19 21:46:51,767 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-19 21:46:51,767 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-19 21:46:51,767 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-19 21:46:51,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:46:51 BoogieIcfgContainer [2020-07-19 21:46:51,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:46:51,799 INFO L168 Benchmark]: Toolchain (without parser) took 1713.54 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 125.8 MB in the end (delta: -22.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:51,800 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory is still 120.8 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 21:46:51,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.13 ms. Allocated memory is still 137.9 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:51,802 INFO L168 Benchmark]: Boogie Preprocessor took 29.61 ms. Allocated memory is still 137.9 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:51,804 INFO L168 Benchmark]: RCFGBuilder took 411.54 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 168.4 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:51,805 INFO L168 Benchmark]: TraceAbstraction took 975.76 ms. Allocated memory is still 201.9 MB. Free memory was 168.4 MB in the beginning and 125.8 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2020-07-19 21:46:51,809 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory is still 120.8 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.13 ms. Allocated memory is still 137.9 MB. Free memory was 103.1 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.61 ms. Allocated memory is still 137.9 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.54 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.0 MB in the beginning and 168.4 MB in the end (delta: -76.4 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 975.76 ms. Allocated memory is still 201.9 MB. Free memory was 168.4 MB in the beginning and 125.8 MB in the end (delta: 42.6 MB). Peak memory consumption was 42.6 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: 0.6s, 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, 0.2s 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...