/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/nla-digbench-scaling/hard-u_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:31:40,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:31:40,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:31:40,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:31:40,957 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 12:31:40,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:31:40,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:31:40,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:31:40,967 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:31:40,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:31:40,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:31:40,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:31:40,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:31:40,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:31:40,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:31:40,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:31:40,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:31:40,969 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:31:40,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:31:40,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:31:40,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:31:40,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:31:40,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:31:40,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:31:40,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:31:40,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:31:40,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:31:40,970 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:31:40,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:31:41,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:31:41,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:31:41,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:31:41,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:31:41,319 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:31:41,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2021-05-06 12:31:41,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6bd08fd/74df45b434bf49b2b927b2a7f355e3d6/FLAGc86f71930 [2021-05-06 12:31:41,842 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:31:41,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c [2021-05-06 12:31:41,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6bd08fd/74df45b434bf49b2b927b2a7f355e3d6/FLAGc86f71930 [2021-05-06 12:31:42,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6bd08fd/74df45b434bf49b2b927b2a7f355e3d6 [2021-05-06 12:31:42,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:31:42,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:31:42,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:31:42,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:31:42,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:31:42,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac64107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42, skipping insertion in model container [2021-05-06 12:31:42,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:31:42,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:31:42,400 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c[545,558] [2021-05-06 12:31:42,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:31:42,433 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:31:42,441 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound20.c[545,558] [2021-05-06 12:31:42,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:31:42,460 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:31:42,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42 WrapperNode [2021-05-06 12:31:42,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:31:42,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:31:42,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:31:42,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:31:42,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (1/1) ... [2021-05-06 12:31:42,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:31:42,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:31:42,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:31:42,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:31:42,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (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 12:31:42,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:31:42,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:31:42,589 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:31:42,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:31:42,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:31:42,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:31:42,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:31:42,590 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:31:42,590 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:31:42,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:31:42,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 12:31:42,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:31:42,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:31:42,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:31:42,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:31:42,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:31:42,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:31:42,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:31:42,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:31:42,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:31:42,874 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:31:42,875 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:31:42,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:31:42 BoogieIcfgContainer [2021-05-06 12:31:42,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:31:42,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:31:42,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:31:42,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:31:42,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:31:42" (1/3) ... [2021-05-06 12:31:42,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24af4a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:31:42, skipping insertion in model container [2021-05-06 12:31:42,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:31:42" (2/3) ... [2021-05-06 12:31:42,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24af4a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:31:42, skipping insertion in model container [2021-05-06 12:31:42,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:31:42" (3/3) ... [2021-05-06 12:31:42,895 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound20.c [2021-05-06 12:31:42,900 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:31:42,902 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:31:42,942 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:31:42,967 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:31:42,967 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:31:42,967 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:31:42,967 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:31:42,967 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:31:42,967 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:31:42,968 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:31:42,968 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:31:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 12:31:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 12:31:42,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:31:42,993 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:31:42,993 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:31:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:31:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 12:31:43,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:31:43,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65447114] [2021-05-06 12:31:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:31:43,064 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:31:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:31:43,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:31:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:31:43,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:31:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:31:43,282 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 12:31:43,284 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:31:43,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65447114] [2021-05-06 12:31:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [65447114] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:31:43,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:31:43,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:31:43,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073832674] [2021-05-06 12:31:43,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:31:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:31:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:31:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:31:43,314 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:31:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:31:43,455 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 12:31:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:31:43,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 12:31:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:31:43,463 INFO L225 Difference]: With dead ends: 66 [2021-05-06 12:31:43,463 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 12:31:43,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:31:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 12:31:43,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 12:31:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 12:31:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 12:31:43,503 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 12:31:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:31:43,503 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 12:31:43,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:31:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 12:31:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 12:31:43,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:31:43,504 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:31:43,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:31:43,505 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:31:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:31:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 12:31:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:31:43,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821110398] [2021-05-06 12:31:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:31:43,508 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:31:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:31:43,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:31:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:31:43,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:31:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:31:43,639 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 12:31:43,639 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:31:43,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821110398] [2021-05-06 12:31:43,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821110398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:31:43,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:31:43,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:31:43,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892333179] [2021-05-06 12:31:43,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:31:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:31:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:31:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:31:43,642 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:31:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:31:43,958 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 12:31:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 12:31:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 12:31:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:31:43,962 INFO L225 Difference]: With dead ends: 47 [2021-05-06 12:31:43,962 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 12:31:43,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 12:31:43,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 12:31:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 12:31:43,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 12:31:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 12:31:44,000 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 12:31:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:31:44,000 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 12:31:44,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:31:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 12:31:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 12:31:44,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:31:44,002 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:31:44,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:31:44,002 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:31:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:31:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 12:31:44,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:31:44,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355538438] [2021-05-06 12:31:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:31:44,012 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:31:44,035 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:31:44,036 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:31:44,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 12:31:44,050 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:31:44,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:31:44 BoogieIcfgContainer [2021-05-06 12:31:44,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:31:44,052 INFO L168 Benchmark]: Toolchain (without parser) took 1804.89 ms. Allocated memory is still 209.7 MB. Free memory was 175.7 MB in the beginning and 123.1 MB in the end (delta: 52.6 MB). Peak memory consumption was 53.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:31:44,052 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 209.7 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:31:44,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.59 ms. Allocated memory is still 209.7 MB. Free memory was 175.6 MB in the beginning and 165.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:31:44,053 INFO L168 Benchmark]: Boogie Preprocessor took 55.22 ms. Allocated memory is still 209.7 MB. Free memory was 165.5 MB in the beginning and 192.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:31:44,054 INFO L168 Benchmark]: RCFGBuilder took 371.11 ms. Allocated memory is still 209.7 MB. Free memory was 192.8 MB in the beginning and 176.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:31:44,054 INFO L168 Benchmark]: TraceAbstraction took 1160.84 ms. Allocated memory is still 209.7 MB. Free memory was 176.0 MB in the beginning and 123.1 MB in the end (delta: 52.9 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:31:44,057 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 209.7 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 212.59 ms. Allocated memory is still 209.7 MB. Free memory was 175.6 MB in the beginning and 165.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.22 ms. Allocated memory is still 209.7 MB. Free memory was 165.5 MB in the beginning and 192.8 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 371.11 ms. Allocated memory is still 209.7 MB. Free memory was 192.8 MB in the beginning and 176.5 MB in the end (delta: 16.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1160.84 ms. Allocated memory is still 209.7 MB. Free memory was 176.0 MB in the beginning and 123.1 MB in the end (delta: 52.9 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L22] int counter = 0; [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B >= 1) [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 [L35] EXPR counter++ [L35] COND FALSE !(counter++<20) [L45] EXPR counter++ [L45] COND FALSE !(counter++<20) [L59] CALL __VERIFIER_assert(A == d*q + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1074.9ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 15.2ms, AutomataDifference: 496.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 82 SDtfs, 38 SDslu, 80 SDs, 0 SdLazy, 100 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 205.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 190.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 59.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...