/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:53:41,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:53:41,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:53:41,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:53:41,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:53:41,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:53:41,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:53:41,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:53:41,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:53:41,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:53:41,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:53:41,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:53:41,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:53:41,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:53:41,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:53:41,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:53:41,846 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:53:41,846 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:53:41,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:53:41,847 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:53:42,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:53:42,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:53:42,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:53:42,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:53:42,126 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:53:42,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv1.c [2021-05-06 11:53:42,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d611f81b/b402599eb09d478abe54f26eee91d4d8/FLAGb72b38204 [2021-05-06 11:53:42,468 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:53:42,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c [2021-05-06 11:53:42,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d611f81b/b402599eb09d478abe54f26eee91d4d8/FLAGb72b38204 [2021-05-06 11:53:42,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d611f81b/b402599eb09d478abe54f26eee91d4d8 [2021-05-06 11:53:42,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:53:42,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:53:42,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:53:42,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:53:42,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:53:42,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:53:42" (1/1) ... [2021-05-06 11:53:42,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6582a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:42, skipping insertion in model container [2021-05-06 11:53:42,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:53:42" (1/1) ... [2021-05-06 11:53:42,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:53:42,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:53:43,004 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c[456,469] [2021-05-06 11:53:43,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:53:43,015 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:53:43,023 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv1.c[456,469] [2021-05-06 11:53:43,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:53:43,033 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:53:43,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43 WrapperNode [2021-05-06 11:53:43,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:53:43,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:53:43,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:53:43,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:53:43,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (1/1) ... [2021-05-06 11:53:43,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:53:43,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:53:43,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:53:43,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:53:43,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (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 [2021-05-06 11:53:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:53:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:53:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:53:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 11:53:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:53:43,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:53:43,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 11:53:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:53:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:53:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:53:43,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:53:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 11:53:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:53:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:53:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:53:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:53:43,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:53:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:53:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:53:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:53:43,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:53:43,339 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:53:43,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:53:43 BoogieIcfgContainer [2021-05-06 11:53:43,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:53:43,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:53:43,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:53:43,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:53:43,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:53:42" (1/3) ... [2021-05-06 11:53:43,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fad2816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:53:43, skipping insertion in model container [2021-05-06 11:53:43,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:53:43" (2/3) ... [2021-05-06 11:53:43,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fad2816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:53:43, skipping insertion in model container [2021-05-06 11:53:43,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:53:43" (3/3) ... [2021-05-06 11:53:43,345 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv1.c [2021-05-06 11:53:43,348 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:53:43,351 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:53:43,362 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:53:43,375 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:53:43,375 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:53:43,375 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:53:43,376 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:53:43,376 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:53:43,376 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:53:43,376 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:53:43,376 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:53:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:53:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 11:53:43,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:53:43,394 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:53:43,399 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:53:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:53:43,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1965397839, now seen corresponding path program 1 times [2021-05-06 11:53:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:53:43,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929275713] [2021-05-06 11:53:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:53:43,462 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:53:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:43,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:53:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:53:43,672 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:53:43,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929275713] [2021-05-06 11:53:43,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1929275713] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:53:43,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:53:43,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:53:43,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899296047] [2021-05-06 11:53:43,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:53:43,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:53:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:53:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:53:43,691 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:53:43,874 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-06 11:53:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:53:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 11:53:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:53:43,880 INFO L225 Difference]: With dead ends: 43 [2021-05-06 11:53:43,880 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 11:53:43,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:53:43,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 11:53:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-06 11:53:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 11:53:43,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-06 11:53:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:53:43,905 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 11:53:43,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 11:53:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:53:43,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:53:43,905 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:53:43,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:53:43,906 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:53:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:53:43,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2050700910, now seen corresponding path program 1 times [2021-05-06 11:53:43,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:53:43,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717703429] [2021-05-06 11:53:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:53:43,946 WARN L240 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size [2021-05-06 11:53:43,952 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:43,956 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:53:43,970 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:53:43,978 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:53:44,024 WARN L245 tifierPushTermWalker]: treesize reduction 8, result has 91.3 percent of original size 84 [2021-05-06 11:53:44,052 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:53:44,065 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:53:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:44,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:53:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:53:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:53:44,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:53:44,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:53:44,334 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:53:44,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717703429] [2021-05-06 11:53:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717703429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:53:44,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:53:44,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:53:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253691791] [2021-05-06 11:53:44,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:53:44,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:53:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:53:44,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:53:44,336 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:53:44,677 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-05-06 11:53:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 11:53:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 11:53:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:53:44,678 INFO L225 Difference]: With dead ends: 19 [2021-05-06 11:53:44,678 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:53:44,679 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:53:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:53:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:53:44,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 11:53:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:53:44,680 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-06 11:53:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:53:44,680 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:53:44,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:53:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:53:44,680 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:53:44,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:53:44,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:53:47,061 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 59 DAG size of output: 5 [2021-05-06 11:53:47,072 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-06 11:53:47,072 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-06 11:53:47,072 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-06 11:53:47,072 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:53:47,072 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= ~SIZE~0 |old(~SIZE~0)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 11:53:47,072 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2021-05-06 11:53:47,073 INFO L198 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-05-06 11:53:47,073 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2021-05-06 11:53:47,073 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 34) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L194 CegarLoopUtils]: At program point L27(lines 27 30) the Hoare annotation is: (<= main_~i~0 (* 3 (div main_~i~0 3))) [2021-05-06 11:53:47,073 INFO L194 CegarLoopUtils]: At program point L27-2(lines 25 31) the Hoare annotation is: (<= main_~i~0 (* 3 (div main_~i~0 3))) [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 20 34) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L201 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-05-06 11:53:47,073 INFO L194 CegarLoopUtils]: At program point L25-2(lines 25 31) the Hoare annotation is: (<= main_~i~0 (* 3 (div main_~i~0 3))) [2021-05-06 11:53:47,074 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 20 34) the Hoare annotation is: true [2021-05-06 11:53:47,074 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 12 17) the Hoare annotation is: true [2021-05-06 11:53:47,074 INFO L194 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:53:47,074 INFO L194 CegarLoopUtils]: At program point L13(lines 13 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:53:47,074 INFO L194 CegarLoopUtils]: At program point L13-2(lines 12 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:53:47,074 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 12 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:53:47,074 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:53:47,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:53:47 BoogieIcfgContainer [2021-05-06 11:53:47,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:53:47,094 INFO L168 Benchmark]: Toolchain (without parser) took 4188.78 ms. Allocated memory is still 172.0 MB. Free memory was 137.1 MB in the beginning and 88.4 MB in the end (delta: 48.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:53:47,095 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 172.0 MB. Free memory is still 153.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:53:47,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 124.84 ms. Allocated memory is still 172.0 MB. Free memory was 136.9 MB in the beginning and 127.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:53:47,095 INFO L168 Benchmark]: Boogie Preprocessor took 77.78 ms. Allocated memory is still 172.0 MB. Free memory was 127.5 MB in the beginning and 155.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2021-05-06 11:53:47,096 INFO L168 Benchmark]: RCFGBuilder took 227.13 ms. Allocated memory is still 172.0 MB. Free memory was 155.5 MB in the beginning and 140.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 11:53:47,096 INFO L168 Benchmark]: TraceAbstraction took 3752.80 ms. Allocated memory is still 172.0 MB. Free memory was 140.3 MB in the beginning and 88.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:53:47,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 172.0 MB. Free memory is still 153.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 124.84 ms. Allocated memory is still 172.0 MB. Free memory was 136.9 MB in the beginning and 127.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.78 ms. Allocated memory is still 172.0 MB. Free memory was 127.5 MB in the beginning and 155.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 227.13 ms. Allocated memory is still 172.0 MB. Free memory was 155.5 MB in the beginning and 140.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3752.80 ms. Allocated memory is still 172.0 MB. Free memory was 140.3 MB in the beginning and 88.4 MB in the end (delta: 51.9 MB). Peak memory consumption was 83.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1306.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.6ms, AutomataDifference: 547.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 2390.9ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 44 SDslu, 42 SDs, 0 SdLazy, 109 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 521.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 14.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 21 LocationsWithAnnotation, 39 PreInvPairs, 60 NumberOfFragments, 97 HoareAnnotationTreeSize, 39 FomulaSimplifications, 362 FormulaSimplificationTreeSizeReduction, 102.5ms HoareSimplificationTime, 21 FomulaSimplificationsInter, 835 FormulaSimplificationTreeSizeReductionInter, 2277.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: i <= 3 * (i / 3) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...