/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 02:14:01,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:14:01,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:14:01,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:14:01,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 02:14:01,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 02:14:01,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 02:14:01,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 02:14:01,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 02:14:01,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 02:14:01,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 02:14:01,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 02:14:01,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 02:14:01,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 02:14:01,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 02:14:01,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 02:14:01,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 02:14:01,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:14:01,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:14:01,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:14:01,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:14:01,480 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:14:01,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:14:01,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:14:01,483 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:14:01,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:14:01,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:14:01,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:14:01,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:14:01,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:14:01,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:14:01,485 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:14:01,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:14:01,485 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:14:01,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:14:01,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:14:01,486 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:14:01,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:14:01,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:14:01,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:14:01,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:14:01,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:14:01,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:14:01,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:14:01,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:14:01,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:14:01,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:14:01,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:14:01,906 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:14:01,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq2.c [2020-11-07 02:14:02,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b915e442/1e7d3ebd930848edbfe74078c98b7e01/FLAGf90dcaf44 [2020-11-07 02:14:02,638 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:14:02,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq2.c [2020-11-07 02:14:02,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b915e442/1e7d3ebd930848edbfe74078c98b7e01/FLAGf90dcaf44 [2020-11-07 02:14:03,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b915e442/1e7d3ebd930848edbfe74078c98b7e01 [2020-11-07 02:14:03,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:14:03,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:14:03,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:14:03,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:14:03,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:14:03,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aab51f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03, skipping insertion in model container [2020-11-07 02:14:03,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:14:03,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:14:03,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:14:03,247 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:14:03,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:14:03,284 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:14:03,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03 WrapperNode [2020-11-07 02:14:03,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:14:03,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:14:03,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:14:03,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:14:03,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (1/1) ... [2020-11-07 02:14:03,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:14:03,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:14:03,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:14:03,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:14:03,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (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 [2020-11-07 02:14:03,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:14:03,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:14:03,419 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:14:03,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:14:03,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:14:03,419 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:14:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:14:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:14:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:14:03,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 02:14:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:14:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:14:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:14:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:14:03,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:14:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:14:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:14:03,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:14:03,794 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:14:03,794 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:14:03,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:03 BoogieIcfgContainer [2020-11-07 02:14:03,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:14:03,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:14:03,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:14:03,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:14:03,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:14:03" (1/3) ... [2020-11-07 02:14:03,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc69cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:03, skipping insertion in model container [2020-11-07 02:14:03,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:14:03" (2/3) ... [2020-11-07 02:14:03,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc69cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:14:03, skipping insertion in model container [2020-11-07 02:14:03,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:14:03" (3/3) ... [2020-11-07 02:14:03,808 INFO L111 eAbstractionObserver]: Analyzing ICFG eq2.c [2020-11-07 02:14:03,829 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:14:03,833 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:14:03,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:14:03,877 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:14:03,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:14:03,878 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:14:03,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:14:03,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:14:03,878 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:14:03,879 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:14:03,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:14:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-11-07 02:14:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 02:14:03,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:03,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:03,909 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1510263874, now seen corresponding path program 1 times [2020-11-07 02:14:03,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:03,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755314573] [2020-11-07 02:14:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:04,018 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:04,356 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 02:14:04,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:04,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755314573] [2020-11-07 02:14:04,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:04,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:14:04,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490861150] [2020-11-07 02:14:04,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:14:04,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:04,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:14:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:14:04,423 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-11-07 02:14:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:04,538 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-11-07 02:14:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:14:04,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-11-07 02:14:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:04,550 INFO L225 Difference]: With dead ends: 61 [2020-11-07 02:14:04,550 INFO L226 Difference]: Without dead ends: 38 [2020-11-07 02:14:04,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:14:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-07 02:14:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-07 02:14:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 02:14:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-11-07 02:14:04,609 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 29 [2020-11-07 02:14:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:04,610 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-11-07 02:14:04,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:14:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-11-07 02:14:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 02:14:04,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:04,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:04,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:14:04,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:04,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1383064033, now seen corresponding path program 1 times [2020-11-07 02:14:04,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:04,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861484127] [2020-11-07 02:14:04,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:04,622 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:14:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:04,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:14:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:14:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:14:05,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861484127] [2020-11-07 02:14:05,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:14:05,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-07 02:14:05,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209885508] [2020-11-07 02:14:05,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-07 02:14:05,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:14:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-07 02:14:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-07 02:14:05,021 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 8 states. [2020-11-07 02:14:05,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:14:05,539 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-11-07 02:14:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 02:14:05,539 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-11-07 02:14:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:14:05,541 INFO L225 Difference]: With dead ends: 49 [2020-11-07 02:14:05,542 INFO L226 Difference]: Without dead ends: 42 [2020-11-07 02:14:05,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-11-07 02:14:05,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-07 02:14:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-11-07 02:14:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-07 02:14:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-11-07 02:14:05,560 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 30 [2020-11-07 02:14:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:14:05,560 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-11-07 02:14:05,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-07 02:14:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-11-07 02:14:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-07 02:14:05,562 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:14:05,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 02:14:05,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:14:05,563 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:14:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:14:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1766203427, now seen corresponding path program 1 times [2020-11-07 02:14:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:14:05,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662846907] [2020-11-07 02:14:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:14:08,528 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 02:14:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:14:08,626 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:14:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:14:08,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:14:08,717 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:14:08,717 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:14:08,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:14:08,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:14:08 BoogieIcfgContainer [2020-11-07 02:14:08,736 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:14:08,738 INFO L168 Benchmark]: Toolchain (without parser) took 5715.26 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 128.1 MB in the beginning and 152.6 MB in the end (delta: -24.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:08,739 INFO L168 Benchmark]: CDTParser took 1.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 125.7 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:14:08,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.72 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 117.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:08,742 INFO L168 Benchmark]: Boogie Preprocessor took 41.05 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:08,743 INFO L168 Benchmark]: RCFGBuilder took 468.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 133.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:08,744 INFO L168 Benchmark]: TraceAbstraction took 4937.25 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 133.2 MB in the beginning and 152.6 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-11-07 02:14:08,748 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 125.7 MB in the end (delta: 77.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.72 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 117.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.05 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 468.22 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 133.7 MB in the end (delta: -17.5 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4937.25 ms. Allocated memory was 151.0 MB in the beginning and 187.7 MB in the end (delta: 36.7 MB). Free memory was 133.2 MB in the beginning and 152.6 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int w = __VERIFIER_nondet_uint(); [L13] unsigned int x = w; [L14] unsigned int y = w + 1; [L15] unsigned int z = x + 1; [L16] COND TRUE __VERIFIER_nondet_uint() [L17] y++ [L18] z++ [L16] COND FALSE !(__VERIFIER_nondet_uint()) [L20] CALL __VERIFIER_assert(y == z) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "eq2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 78 SDtfs, 75 SDslu, 106 SDs, 0 SdLazy, 107 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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, 3 StatesRemovedByMinimization, 1 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 proved your program to be incorrect! Received shutdown request...