/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/count_up_down-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-46f3038-m [2020-07-08 17:37:00,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-08 17:37:00,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-08 17:37:00,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-08 17:37:00,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-08 17:37:00,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-08 17:37:00,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-08 17:37:00,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-08 17:37:00,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-08 17:37:00,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-08 17:37:00,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-08 17:37:00,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-08 17:37:00,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-08 17:37:00,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-08 17:37:00,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-08 17:37:00,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-08 17:37:00,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-08 17:37:00,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-08 17:37:00,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-08 17:37:00,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-08 17:37:00,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-08 17:37:00,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-08 17:37:00,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-08 17:37:00,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-08 17:37:00,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-08 17:37:00,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-08 17:37:00,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-08 17:37:00,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-08 17:37:00,362 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-08 17:37:00,374 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-08 17:37:00,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-08 17:37:00,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-08 17:37:00,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-08 17:37:00,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-08 17:37:00,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-08 17:37:00,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-08 17:37:00,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-08 17:37:00,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-08 17:37:00,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-08 17:37:00,378 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-08 17:37:00,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-08 17:37:00,378 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-08 17:37:00,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-08 17:37:00,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-08 17:37:00,379 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-08 17:37:00,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-08 17:37:00,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-08 17:37:00,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 17:37:00,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-08 17:37:00,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-08 17:37:00,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-08 17:37:00,380 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-08 17:37:00,696 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-08 17:37:00,720 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-08 17:37:00,724 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-08 17:37:00,726 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-08 17:37:00,726 INFO L275 PluginConnector]: CDTParser initialized [2020-07-08 17:37:00,727 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-2.c [2020-07-08 17:37:00,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd427ae4/c541e9aa7d804f618b0969159f0cc360/FLAG083f6924c [2020-07-08 17:37:01,428 INFO L306 CDTParser]: Found 1 translation units. [2020-07-08 17:37:01,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-2.c [2020-07-08 17:37:01,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd427ae4/c541e9aa7d804f618b0969159f0cc360/FLAG083f6924c [2020-07-08 17:37:01,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd427ae4/c541e9aa7d804f618b0969159f0cc360 [2020-07-08 17:37:01,757 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-08 17:37:01,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-08 17:37:01,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-08 17:37:01,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-08 17:37:01,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-08 17:37:01,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 05:37:01" (1/1) ... [2020-07-08 17:37:01,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4386dceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:01, skipping insertion in model container [2020-07-08 17:37:01,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.07 05:37:01" (1/1) ... [2020-07-08 17:37:01,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-08 17:37:01,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-08 17:37:01,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 17:37:02,005 INFO L203 MainTranslator]: Completed pre-run [2020-07-08 17:37:02,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-08 17:37:02,044 INFO L208 MainTranslator]: Completed translation [2020-07-08 17:37:02,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02 WrapperNode [2020-07-08 17:37:02,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-08 17:37:02,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-08 17:37:02,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-08 17:37:02,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-08 17:37:02,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... [2020-07-08 17:37:02,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-08 17:37:02,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-08 17:37:02,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-08 17:37:02,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-08 17:37:02,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-08 17:37:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-08 17:37:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-08 17:37:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-08 17:37:02,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-08 17:37:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-08 17:37:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-08 17:37:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-08 17:37:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-08 17:37:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-08 17:37:02,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-08 17:37:02,608 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-08 17:37:02,609 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-08 17:37:02,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 05:37:02 BoogieIcfgContainer [2020-07-08 17:37:02,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-08 17:37:02,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-08 17:37:02,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-08 17:37:02,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-08 17:37:02,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.07 05:37:01" (1/3) ... [2020-07-08 17:37:02,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cf0ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 05:37:02, skipping insertion in model container [2020-07-08 17:37:02,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.07 05:37:02" (2/3) ... [2020-07-08 17:37:02,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61cf0ae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.07 05:37:02, skipping insertion in model container [2020-07-08 17:37:02,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.07 05:37:02" (3/3) ... [2020-07-08 17:37:02,645 INFO L109 eAbstractionObserver]: Analyzing ICFG count_up_down-2.c [2020-07-08 17:37:02,666 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-08 17:37:02,678 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-08 17:37:02,704 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-08 17:37:02,730 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-08 17:37:02,730 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-08 17:37:02,731 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-08 17:37:02,731 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-08 17:37:02,731 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-08 17:37:02,731 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-08 17:37:02,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-08 17:37:02,732 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-08 17:37:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-07-08 17:37:02,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-08 17:37:02,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 17:37:02,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-08 17:37:02,763 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 17:37:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 17:37:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1049095342, now seen corresponding path program 1 times [2020-07-08 17:37:02,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 17:37:02,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487717904] [2020-07-08 17:37:02,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 17:37:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:37:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-08 17:37:02,968 INFO L280 TraceCheckUtils]: 0: Hoare triple {29#true} assume true; {29#true} is VALID [2020-07-08 17:37:02,969 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {29#true} {29#true} #40#return; {29#true} is VALID [2020-07-08 17:37:02,972 INFO L263 TraceCheckUtils]: 0: Hoare triple {29#true} call ULTIMATE.init(); {29#true} is VALID [2020-07-08 17:37:02,974 INFO L280 TraceCheckUtils]: 1: Hoare triple {29#true} assume true; {29#true} is VALID [2020-07-08 17:37:02,975 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {29#true} {29#true} #40#return; {29#true} is VALID [2020-07-08 17:37:02,976 INFO L263 TraceCheckUtils]: 3: Hoare triple {29#true} call #t~ret3 := main(); {29#true} is VALID [2020-07-08 17:37:02,976 INFO L280 TraceCheckUtils]: 4: Hoare triple {29#true} ~n~0 := #t~nondet0; {29#true} is VALID [2020-07-08 17:37:02,977 INFO L280 TraceCheckUtils]: 5: Hoare triple {29#true} havoc #t~nondet0; {29#true} is VALID [2020-07-08 17:37:02,977 INFO L280 TraceCheckUtils]: 6: Hoare triple {29#true} ~x~0 := ~n~0; {29#true} is VALID [2020-07-08 17:37:02,978 INFO L280 TraceCheckUtils]: 7: Hoare triple {29#true} ~y~0 := 0; {29#true} is VALID [2020-07-08 17:37:02,992 INFO L280 TraceCheckUtils]: 8: Hoare triple {29#true} assume !true; {30#false} is VALID [2020-07-08 17:37:02,994 INFO L263 TraceCheckUtils]: 9: Hoare triple {30#false} call __VERIFIER_assert((if ~y~0 % 4294967296 != ~n~0 % 4294967296 then 1 else 0)); {30#false} is VALID [2020-07-08 17:37:02,994 INFO L280 TraceCheckUtils]: 10: Hoare triple {30#false} ~cond := #in~cond; {30#false} is VALID [2020-07-08 17:37:02,995 INFO L280 TraceCheckUtils]: 11: Hoare triple {30#false} assume 0 == ~cond; {30#false} is VALID [2020-07-08 17:37:02,995 INFO L280 TraceCheckUtils]: 12: Hoare triple {30#false} assume !false; {30#false} is VALID [2020-07-08 17:37:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-08 17:37:02,999 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 17:37:03,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487717904] [2020-07-08 17:37:03,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-08 17:37:03,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-08 17:37:03,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066080925] [2020-07-08 17:37:03,020 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-08 17:37:03,028 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-08 17:37:03,033 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-08 17:37:03,084 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:37:03,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-08 17:37:03,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-08 17:37:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-08 17:37:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-08 17:37:03,099 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-07-08 17:37:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:37:03,234 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-08 17:37:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-08 17:37:03,235 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-08 17:37:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-08 17:37:03,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-08 17:37:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 40 transitions. [2020-07-08 17:37:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-08 17:37:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 40 transitions. [2020-07-08 17:37:03,259 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 40 transitions. [2020-07-08 17:37:03,345 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:37:03,359 INFO L225 Difference]: With dead ends: 37 [2020-07-08 17:37:03,360 INFO L226 Difference]: Without dead ends: 20 [2020-07-08 17:37:03,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-08 17:37:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-08 17:37:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-08 17:37:03,433 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-08 17:37:03,434 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand 20 states. [2020-07-08 17:37:03,435 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand 20 states. [2020-07-08 17:37:03,435 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 20 states. [2020-07-08 17:37:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:37:03,440 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-07-08 17:37:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-08 17:37:03,441 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 17:37:03,441 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 17:37:03,441 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand 20 states. [2020-07-08 17:37:03,442 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 20 states. [2020-07-08 17:37:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-08 17:37:03,447 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-07-08 17:37:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-08 17:37:03,448 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-08 17:37:03,448 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-08 17:37:03,448 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-08 17:37:03,449 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-08 17:37:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-08 17:37:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-08 17:37:03,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2020-07-08 17:37:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-08 17:37:03,455 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-08 17:37:03,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-08 17:37:03,456 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 20 states and 20 transitions. [2020-07-08 17:37:03,495 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-08 17:37:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-08 17:37:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-08 17:37:03,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-08 17:37:03,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-08 17:37:03,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-08 17:37:03,498 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-08 17:37:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-08 17:37:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1039860132, now seen corresponding path program 1 times [2020-07-08 17:37:03,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-08 17:37:03,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77239603] [2020-07-08 17:37:03,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-08 17:37:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-08 17:37:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-08 17:37:03,600 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-08 17:37:03,601 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-08 17:37:03,601 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-08 17:37:03,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-08 17:37:03,625 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-08 17:37:03,625 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-08 17:37:03,625 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-08 17:37:03,625 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-08 17:37:03,626 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-08 17:37:03,626 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-08 17:37:03,626 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-08 17:37:03,626 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-08 17:37:03,626 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2020-07-08 17:37:03,626 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-08 17:37:03,627 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-08 17:37:03,627 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-08 17:37:03,627 WARN L170 areAnnotationChecker]: L14 has no Hoare annotation [2020-07-08 17:37:03,627 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-08 17:37:03,628 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-08 17:37:03,628 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-08 17:37:03,628 WARN L170 areAnnotationChecker]: L14-1 has no Hoare annotation [2020-07-08 17:37:03,628 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-08 17:37:03,628 WARN L170 areAnnotationChecker]: L15-2 has no Hoare annotation [2020-07-08 17:37:03,628 WARN L170 areAnnotationChecker]: L15-2 has no Hoare annotation [2020-07-08 17:37:03,629 WARN L170 areAnnotationChecker]: L15-2 has no Hoare annotation [2020-07-08 17:37:03,629 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-08 17:37:03,629 WARN L170 areAnnotationChecker]: L15-3 has no Hoare annotation [2020-07-08 17:37:03,629 WARN L170 areAnnotationChecker]: L15-3 has no Hoare annotation [2020-07-08 17:37:03,629 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2020-07-08 17:37:03,629 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-08 17:37:03,630 WARN L170 areAnnotationChecker]: L17-1 has no Hoare annotation [2020-07-08 17:37:03,630 WARN L170 areAnnotationChecker]: L17-2 has no Hoare annotation [2020-07-08 17:37:03,630 WARN L170 areAnnotationChecker]: L18 has no Hoare annotation [2020-07-08 17:37:03,630 WARN L170 areAnnotationChecker]: L18-1 has no Hoare annotation [2020-07-08 17:37:03,630 WARN L170 areAnnotationChecker]: L18-2 has no Hoare annotation [2020-07-08 17:37:03,630 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-08 17:37:03,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.07 05:37:03 BoogieIcfgContainer [2020-07-08 17:37:03,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-08 17:37:03,639 INFO L168 Benchmark]: Toolchain (without parser) took 1878.64 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 101.6 MB in the beginning and 114.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 44.5 MB. Max. memory is 7.1 GB. [2020-07-08 17:37:03,640 INFO L168 Benchmark]: CDTParser took 1.03 ms. Allocated memory is still 144.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-08 17:37:03,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.22 ms. Allocated memory is still 144.2 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-08 17:37:03,642 INFO L168 Benchmark]: Boogie Preprocessor took 155.55 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 92.0 MB in the beginning and 182.0 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-08 17:37:03,643 INFO L168 Benchmark]: RCFGBuilder took 413.33 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 166.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-08 17:37:03,644 INFO L168 Benchmark]: TraceAbstraction took 1018.43 ms. Allocated memory is still 201.9 MB. Free memory was 165.6 MB in the beginning and 114.8 MB in the end (delta: 50.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. [2020-07-08 17:37:03,648 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.03 ms. Allocated memory is still 144.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.22 ms. Allocated memory is still 144.2 MB. Free memory was 101.4 MB in the beginning and 92.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.55 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 92.0 MB in the beginning and 182.0 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 413.33 ms. Allocated memory is still 201.9 MB. Free memory was 181.1 MB in the beginning and 166.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1018.43 ms. Allocated memory is still 201.9 MB. Free memory was 165.6 MB in the beginning and 114.8 MB in the end (delta: 50.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int n = __VERIFIER_nondet_uint(); [L14] unsigned int x=n, y=0; [L15] COND FALSE !(x>0) [L20] CALL __VERIFIER_assert(y!=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...