/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 22:51:47,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 22:51:47,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 22:51:47,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 22:51:47,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 22:51:47,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 22:51:47,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 22:51:47,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 22:51:47,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 22:51:47,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 22:51:47,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 22:51:47,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 22:51:47,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 22:51:47,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 22:51:47,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 22:51:47,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 22:51:47,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 22:51:47,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 22:51:47,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 22:51:47,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 22:51:47,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 22:51:47,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 22:51:47,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 22:51:47,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 22:51:47,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 22:51:47,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 22:51:47,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 22:51:47,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 22:51:47,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 22:51:47,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 22:51:47,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 22:51:47,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 22:51:47,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 22:51:47,146 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 22:51:47,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 22:51:47,146 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 22:51:47,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 22:51:47,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 22:51:47,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 22:51:47,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 22:51:47,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 22:51:47,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 22:51:47,148 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 22:51:47,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 22:51:47,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 22:51:47,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 22:51:47,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 22:51:47,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 22:51:47,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 22:51:47,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 22:51:47,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 22:51:47,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 22:51:47,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 22:51:47,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 22:51:47,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 22:51:47,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 22:51:47,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 22:51:47,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 22:51:47,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 22:51:47,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 22:51:47,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 22:51:47,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 22:51:47,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 22:51:47,459 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 22:51:47,460 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-07-17 22:51:47,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babff68a8/17ebcba58015424dbbc304e1c4ab4c67/FLAGe3077e125 [2020-07-17 22:51:48,042 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 22:51:48,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-07-17 22:51:48,049 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babff68a8/17ebcba58015424dbbc304e1c4ab4c67/FLAGe3077e125 [2020-07-17 22:51:48,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babff68a8/17ebcba58015424dbbc304e1c4ab4c67 [2020-07-17 22:51:48,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 22:51:48,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 22:51:48,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 22:51:48,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 22:51:48,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 22:51:48,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eacc796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48, skipping insertion in model container [2020-07-17 22:51:48,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 22:51:48,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 22:51:48,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:51:48,706 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 22:51:48,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:51:48,740 INFO L208 MainTranslator]: Completed translation [2020-07-17 22:51:48,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48 WrapperNode [2020-07-17 22:51:48,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 22:51:48,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 22:51:48,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 22:51:48,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 22:51:48,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (1/1) ... [2020-07-17 22:51:48,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 22:51:48,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 22:51:48,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 22:51:48,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 22:51:48,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (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 [2020-07-17 22:51:48,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 22:51:48,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 22:51:48,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 22:51:48,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 22:51:48,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 22:51:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 22:51:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 22:51:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 22:51:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 22:51:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 22:51:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 22:51:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 22:51:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 22:51:49,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 22:51:49,228 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 22:51:49,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:51:49 BoogieIcfgContainer [2020-07-17 22:51:49,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 22:51:49,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 22:51:49,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 22:51:49,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 22:51:49,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 10:51:48" (1/3) ... [2020-07-17 22:51:49,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6891c8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:51:49, skipping insertion in model container [2020-07-17 22:51:49,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:51:48" (2/3) ... [2020-07-17 22:51:49,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6891c8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:51:49, skipping insertion in model container [2020-07-17 22:51:49,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:51:49" (3/3) ... [2020-07-17 22:51:49,276 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-07-17 22:51:49,301 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 22:51:49,318 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 22:51:49,340 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 22:51:49,362 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 22:51:49,362 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 22:51:49,362 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 22:51:49,362 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 22:51:49,362 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 22:51:49,363 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 22:51:49,363 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 22:51:49,363 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 22:51:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 22:51:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 22:51:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:51:49,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:51:49,388 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:51:49,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:51:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1915647303, now seen corresponding path program 1 times [2020-07-17 22:51:49,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:51:49,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621093100] [2020-07-17 22:51:49,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:51:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:49,523 INFO L280 TraceCheckUtils]: 0: Hoare triple {23#true} assume true; {23#true} is VALID [2020-07-17 22:51:49,524 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {23#true} {23#true} #47#return; {23#true} is VALID [2020-07-17 22:51:49,525 INFO L263 TraceCheckUtils]: 0: Hoare triple {23#true} call ULTIMATE.init(); {23#true} is VALID [2020-07-17 22:51:49,526 INFO L280 TraceCheckUtils]: 1: Hoare triple {23#true} assume true; {23#true} is VALID [2020-07-17 22:51:49,526 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {23#true} {23#true} #47#return; {23#true} is VALID [2020-07-17 22:51:49,527 INFO L263 TraceCheckUtils]: 3: Hoare triple {23#true} call #t~ret2 := main(); {23#true} is VALID [2020-07-17 22:51:49,527 INFO L280 TraceCheckUtils]: 4: Hoare triple {23#true} ~x~0 := 1;~y~0 := 0; {23#true} is VALID [2020-07-17 22:51:49,535 INFO L280 TraceCheckUtils]: 5: Hoare triple {23#true} assume !true; {24#false} is VALID [2020-07-17 22:51:49,535 INFO L263 TraceCheckUtils]: 6: Hoare triple {24#false} call __VERIFIER_assert((if ~x~0 >= ~y~0 then 1 else 0)); {24#false} is VALID [2020-07-17 22:51:49,536 INFO L280 TraceCheckUtils]: 7: Hoare triple {24#false} ~cond := #in~cond; {24#false} is VALID [2020-07-17 22:51:49,536 INFO L280 TraceCheckUtils]: 8: Hoare triple {24#false} assume 0 == ~cond; {24#false} is VALID [2020-07-17 22:51:49,536 INFO L280 TraceCheckUtils]: 9: Hoare triple {24#false} assume !false; {24#false} is VALID [2020-07-17 22:51:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:51:49,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621093100] [2020-07-17 22:51:49,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 22:51:49,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 22:51:49,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205717750] [2020-07-17 22:51:49,549 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 22:51:49,553 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:51:49,557 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-17 22:51:49,609 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:49,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 22:51:49,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:51:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 22:51:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 22:51:49,626 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-17 22:51:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:49,685 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-17 22:51:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 22:51:49,686 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 22:51:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:51:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-17 22:51:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2020-07-17 22:51:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-17 22:51:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2020-07-17 22:51:49,702 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 36 transitions. [2020-07-17 22:51:49,771 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:49,782 INFO L225 Difference]: With dead ends: 32 [2020-07-17 22:51:49,783 INFO L226 Difference]: Without dead ends: 13 [2020-07-17 22:51:49,787 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 [2020-07-17 22:51:49,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-17 22:51:49,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-17 22:51:49,838 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:51:49,839 INFO L82 GeneralOperation]: Start isEquivalent. First operand 13 states. Second operand 13 states. [2020-07-17 22:51:49,840 INFO L74 IsIncluded]: Start isIncluded. First operand 13 states. Second operand 13 states. [2020-07-17 22:51:49,840 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 13 states. [2020-07-17 22:51:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:49,846 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-07-17 22:51:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-17 22:51:49,847 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:49,847 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:49,847 INFO L74 IsIncluded]: Start isIncluded. First operand 13 states. Second operand 13 states. [2020-07-17 22:51:49,847 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 13 states. [2020-07-17 22:51:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:49,854 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-07-17 22:51:49,854 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-17 22:51:49,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:49,856 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:49,856 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:51:49,856 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:51:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-17 22:51:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-17 22:51:49,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-17 22:51:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:51:49,868 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-17 22:51:49,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 22:51:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-17 22:51:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-17 22:51:49,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:51:49,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:51:49,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 22:51:49,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:51:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:51:49,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2084433522, now seen corresponding path program 1 times [2020-07-17 22:51:49,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:51:49,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566551672] [2020-07-17 22:51:49,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:51:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:50,022 INFO L280 TraceCheckUtils]: 0: Hoare triple {116#true} assume true; {116#true} is VALID [2020-07-17 22:51:50,023 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {116#true} {116#true} #47#return; {116#true} is VALID [2020-07-17 22:51:50,023 INFO L263 TraceCheckUtils]: 0: Hoare triple {116#true} call ULTIMATE.init(); {116#true} is VALID [2020-07-17 22:51:50,024 INFO L280 TraceCheckUtils]: 1: Hoare triple {116#true} assume true; {116#true} is VALID [2020-07-17 22:51:50,024 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {116#true} {116#true} #47#return; {116#true} is VALID [2020-07-17 22:51:50,024 INFO L263 TraceCheckUtils]: 3: Hoare triple {116#true} call #t~ret2 := main(); {116#true} is VALID [2020-07-17 22:51:50,025 INFO L280 TraceCheckUtils]: 4: Hoare triple {116#true} ~x~0 := 1;~y~0 := 0; {120#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,026 INFO L280 TraceCheckUtils]: 5: Hoare triple {120#(<= main_~y~0 main_~x~0)} #t~short1 := ~y~0 < 1000; {120#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,027 INFO L280 TraceCheckUtils]: 6: Hoare triple {120#(<= main_~y~0 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {120#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,029 INFO L280 TraceCheckUtils]: 7: Hoare triple {120#(<= main_~y~0 main_~x~0)} assume !#t~short1;havoc #t~short1;havoc #t~nondet0; {120#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,031 INFO L263 TraceCheckUtils]: 8: Hoare triple {120#(<= main_~y~0 main_~x~0)} call __VERIFIER_assert((if ~x~0 >= ~y~0 then 1 else 0)); {121#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-17 22:51:50,032 INFO L280 TraceCheckUtils]: 9: Hoare triple {121#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {122#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-17 22:51:50,032 INFO L280 TraceCheckUtils]: 10: Hoare triple {122#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {117#false} is VALID [2020-07-17 22:51:50,033 INFO L280 TraceCheckUtils]: 11: Hoare triple {117#false} assume !false; {117#false} is VALID [2020-07-17 22:51:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:51:50,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566551672] [2020-07-17 22:51:50,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 22:51:50,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 22:51:50,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334114970] [2020-07-17 22:51:50,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-17 22:51:50,037 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:51:50,037 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states. [2020-07-17 22:51:50,056 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:50,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 22:51:50,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:51:50,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 22:51:50,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 22:51:50,057 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2020-07-17 22:51:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:50,170 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-07-17 22:51:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 22:51:50,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-17 22:51:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:51:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-17 22:51:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 23 transitions. [2020-07-17 22:51:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-07-17 22:51:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 23 transitions. [2020-07-17 22:51:50,175 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 23 transitions. [2020-07-17 22:51:50,210 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:50,212 INFO L225 Difference]: With dead ends: 21 [2020-07-17 22:51:50,213 INFO L226 Difference]: Without dead ends: 16 [2020-07-17 22:51:50,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 22:51:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-17 22:51:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-17 22:51:50,223 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:51:50,223 INFO L82 GeneralOperation]: Start isEquivalent. First operand 16 states. Second operand 16 states. [2020-07-17 22:51:50,223 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand 16 states. [2020-07-17 22:51:50,223 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 16 states. [2020-07-17 22:51:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:50,226 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-07-17 22:51:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-17 22:51:50,226 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:50,227 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:50,227 INFO L74 IsIncluded]: Start isIncluded. First operand 16 states. Second operand 16 states. [2020-07-17 22:51:50,227 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 16 states. [2020-07-17 22:51:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:50,229 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-07-17 22:51:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-17 22:51:50,230 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:50,230 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:50,231 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:51:50,231 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:51:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-17 22:51:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-17 22:51:50,233 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-07-17 22:51:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:51:50,233 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-17 22:51:50,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 22:51:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-17 22:51:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 22:51:50,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:51:50,235 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:51:50,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 22:51:50,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:51:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:51:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash 249504553, now seen corresponding path program 1 times [2020-07-17 22:51:50,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:51:50,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191276516] [2020-07-17 22:51:50,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:51:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:50,382 INFO L280 TraceCheckUtils]: 0: Hoare triple {214#true} assume true; {214#true} is VALID [2020-07-17 22:51:50,382 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {214#true} {214#true} #47#return; {214#true} is VALID [2020-07-17 22:51:50,383 INFO L263 TraceCheckUtils]: 0: Hoare triple {214#true} call ULTIMATE.init(); {214#true} is VALID [2020-07-17 22:51:50,383 INFO L280 TraceCheckUtils]: 1: Hoare triple {214#true} assume true; {214#true} is VALID [2020-07-17 22:51:50,383 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {214#true} {214#true} #47#return; {214#true} is VALID [2020-07-17 22:51:50,383 INFO L263 TraceCheckUtils]: 3: Hoare triple {214#true} call #t~ret2 := main(); {214#true} is VALID [2020-07-17 22:51:50,384 INFO L280 TraceCheckUtils]: 4: Hoare triple {214#true} ~x~0 := 1;~y~0 := 0; {218#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:50,385 INFO L280 TraceCheckUtils]: 5: Hoare triple {218#(<= 1 main_~x~0)} #t~short1 := ~y~0 < 1000; {218#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:50,386 INFO L280 TraceCheckUtils]: 6: Hoare triple {218#(<= 1 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {218#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:50,387 INFO L280 TraceCheckUtils]: 7: Hoare triple {218#(<= 1 main_~x~0)} assume !!#t~short1;havoc #t~short1;havoc #t~nondet0;~x~0 := ~x~0 + ~y~0;~y~0 := 1 + ~y~0; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,388 INFO L280 TraceCheckUtils]: 8: Hoare triple {219#(<= main_~y~0 main_~x~0)} #t~short1 := ~y~0 < 1000; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,389 INFO L280 TraceCheckUtils]: 9: Hoare triple {219#(<= main_~y~0 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,389 INFO L280 TraceCheckUtils]: 10: Hoare triple {219#(<= main_~y~0 main_~x~0)} assume !#t~short1;havoc #t~short1;havoc #t~nondet0; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,391 INFO L263 TraceCheckUtils]: 11: Hoare triple {219#(<= main_~y~0 main_~x~0)} call __VERIFIER_assert((if ~x~0 >= ~y~0 then 1 else 0)); {220#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-17 22:51:50,392 INFO L280 TraceCheckUtils]: 12: Hoare triple {220#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {221#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-17 22:51:50,392 INFO L280 TraceCheckUtils]: 13: Hoare triple {221#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {215#false} is VALID [2020-07-17 22:51:50,393 INFO L280 TraceCheckUtils]: 14: Hoare triple {215#false} assume !false; {215#false} is VALID [2020-07-17 22:51:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:51:50,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191276516] [2020-07-17 22:51:50,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349183545] [2020-07-17 22:51:50,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 22:51:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:50,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 22:51:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:50,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 22:51:50,551 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 22:51:50,596 INFO L263 TraceCheckUtils]: 0: Hoare triple {214#true} call ULTIMATE.init(); {214#true} is VALID [2020-07-17 22:51:50,596 INFO L280 TraceCheckUtils]: 1: Hoare triple {214#true} assume true; {214#true} is VALID [2020-07-17 22:51:50,597 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {214#true} {214#true} #47#return; {214#true} is VALID [2020-07-17 22:51:50,597 INFO L263 TraceCheckUtils]: 3: Hoare triple {214#true} call #t~ret2 := main(); {214#true} is VALID [2020-07-17 22:51:50,598 INFO L280 TraceCheckUtils]: 4: Hoare triple {214#true} ~x~0 := 1;~y~0 := 0; {218#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:50,599 INFO L280 TraceCheckUtils]: 5: Hoare triple {218#(<= 1 main_~x~0)} #t~short1 := ~y~0 < 1000; {218#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:50,600 INFO L280 TraceCheckUtils]: 6: Hoare triple {218#(<= 1 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {218#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:50,601 INFO L280 TraceCheckUtils]: 7: Hoare triple {218#(<= 1 main_~x~0)} assume !!#t~short1;havoc #t~short1;havoc #t~nondet0;~x~0 := ~x~0 + ~y~0;~y~0 := 1 + ~y~0; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,602 INFO L280 TraceCheckUtils]: 8: Hoare triple {219#(<= main_~y~0 main_~x~0)} #t~short1 := ~y~0 < 1000; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,603 INFO L280 TraceCheckUtils]: 9: Hoare triple {219#(<= main_~y~0 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,603 INFO L280 TraceCheckUtils]: 10: Hoare triple {219#(<= main_~y~0 main_~x~0)} assume !#t~short1;havoc #t~short1;havoc #t~nondet0; {219#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:50,605 INFO L263 TraceCheckUtils]: 11: Hoare triple {219#(<= main_~y~0 main_~x~0)} call __VERIFIER_assert((if ~x~0 >= ~y~0 then 1 else 0)); {258#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2020-07-17 22:51:50,606 INFO L280 TraceCheckUtils]: 12: Hoare triple {258#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {262#(<= 1 __VERIFIER_assert_~cond)} is VALID [2020-07-17 22:51:50,607 INFO L280 TraceCheckUtils]: 13: Hoare triple {262#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {215#false} is VALID [2020-07-17 22:51:50,607 INFO L280 TraceCheckUtils]: 14: Hoare triple {215#false} assume !false; {215#false} is VALID [2020-07-17 22:51:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:51:50,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 22:51:50,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-17 22:51:50,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581714637] [2020-07-17 22:51:50,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-07-17 22:51:50,611 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:51:50,611 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2020-07-17 22:51:50,635 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:50,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 22:51:50,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:51:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 22:51:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-17 22:51:50,636 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2020-07-17 22:51:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:50,778 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-17 22:51:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 22:51:50,778 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-07-17 22:51:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:51:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-17 22:51:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 27 transitions. [2020-07-17 22:51:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-17 22:51:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 27 transitions. [2020-07-17 22:51:50,783 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 27 transitions. [2020-07-17 22:51:50,818 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:50,819 INFO L225 Difference]: With dead ends: 24 [2020-07-17 22:51:50,820 INFO L226 Difference]: Without dead ends: 19 [2020-07-17 22:51:50,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-17 22:51:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-17 22:51:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-17 22:51:50,831 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:51:50,831 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand 19 states. [2020-07-17 22:51:50,831 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand 19 states. [2020-07-17 22:51:50,831 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 19 states. [2020-07-17 22:51:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:50,833 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-07-17 22:51:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-17 22:51:50,834 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:50,834 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:50,834 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand 19 states. [2020-07-17 22:51:50,835 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 19 states. [2020-07-17 22:51:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:50,837 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-07-17 22:51:50,837 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-17 22:51:50,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:50,837 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:50,838 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:51:50,838 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:51:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-17 22:51:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-07-17 22:51:50,840 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2020-07-17 22:51:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:51:50,840 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-07-17 22:51:50,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 22:51:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-17 22:51:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 22:51:50,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:51:50,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:51:51,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-17 22:51:51,043 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:51:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:51:51,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2070634734, now seen corresponding path program 2 times [2020-07-17 22:51:51,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:51:51,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061597700] [2020-07-17 22:51:51,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:51:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:51,160 INFO L280 TraceCheckUtils]: 0: Hoare triple {373#true} assume true; {373#true} is VALID [2020-07-17 22:51:51,160 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {373#true} {373#true} #47#return; {373#true} is VALID [2020-07-17 22:51:51,161 INFO L263 TraceCheckUtils]: 0: Hoare triple {373#true} call ULTIMATE.init(); {373#true} is VALID [2020-07-17 22:51:51,161 INFO L280 TraceCheckUtils]: 1: Hoare triple {373#true} assume true; {373#true} is VALID [2020-07-17 22:51:51,161 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {373#true} {373#true} #47#return; {373#true} is VALID [2020-07-17 22:51:51,162 INFO L263 TraceCheckUtils]: 3: Hoare triple {373#true} call #t~ret2 := main(); {373#true} is VALID [2020-07-17 22:51:51,163 INFO L280 TraceCheckUtils]: 4: Hoare triple {373#true} ~x~0 := 1;~y~0 := 0; {377#(<= 1 (+ main_~x~0 main_~y~0))} is VALID [2020-07-17 22:51:51,164 INFO L280 TraceCheckUtils]: 5: Hoare triple {377#(<= 1 (+ main_~x~0 main_~y~0))} #t~short1 := ~y~0 < 1000; {377#(<= 1 (+ main_~x~0 main_~y~0))} is VALID [2020-07-17 22:51:51,165 INFO L280 TraceCheckUtils]: 6: Hoare triple {377#(<= 1 (+ main_~x~0 main_~y~0))} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {377#(<= 1 (+ main_~x~0 main_~y~0))} is VALID [2020-07-17 22:51:51,166 INFO L280 TraceCheckUtils]: 7: Hoare triple {377#(<= 1 (+ main_~x~0 main_~y~0))} assume !!#t~short1;havoc #t~short1;havoc #t~nondet0;~x~0 := ~x~0 + ~y~0;~y~0 := 1 + ~y~0; {378#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:51,167 INFO L280 TraceCheckUtils]: 8: Hoare triple {378#(<= 1 main_~x~0)} #t~short1 := ~y~0 < 1000; {378#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:51,168 INFO L280 TraceCheckUtils]: 9: Hoare triple {378#(<= 1 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {378#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:51,170 INFO L280 TraceCheckUtils]: 10: Hoare triple {378#(<= 1 main_~x~0)} assume !!#t~short1;havoc #t~short1;havoc #t~nondet0;~x~0 := ~x~0 + ~y~0;~y~0 := 1 + ~y~0; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,171 INFO L280 TraceCheckUtils]: 11: Hoare triple {379#(<= main_~y~0 main_~x~0)} #t~short1 := ~y~0 < 1000; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,172 INFO L280 TraceCheckUtils]: 12: Hoare triple {379#(<= main_~y~0 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,173 INFO L280 TraceCheckUtils]: 13: Hoare triple {379#(<= main_~y~0 main_~x~0)} assume !#t~short1;havoc #t~short1;havoc #t~nondet0; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,174 INFO L263 TraceCheckUtils]: 14: Hoare triple {379#(<= main_~y~0 main_~x~0)} call __VERIFIER_assert((if ~x~0 >= ~y~0 then 1 else 0)); {380#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-17 22:51:51,176 INFO L280 TraceCheckUtils]: 15: Hoare triple {380#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {381#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-17 22:51:51,177 INFO L280 TraceCheckUtils]: 16: Hoare triple {381#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {374#false} is VALID [2020-07-17 22:51:51,177 INFO L280 TraceCheckUtils]: 17: Hoare triple {374#false} assume !false; {374#false} is VALID [2020-07-17 22:51:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:51:51,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061597700] [2020-07-17 22:51:51,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853097378] [2020-07-17 22:51:51,180 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 22:51:51,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-17 22:51:51,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 22:51:51,219 INFO L264 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-17 22:51:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:51:51,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 22:51:51,325 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 22:51:51,372 INFO L263 TraceCheckUtils]: 0: Hoare triple {373#true} call ULTIMATE.init(); {373#true} is VALID [2020-07-17 22:51:51,372 INFO L280 TraceCheckUtils]: 1: Hoare triple {373#true} assume true; {373#true} is VALID [2020-07-17 22:51:51,373 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {373#true} {373#true} #47#return; {373#true} is VALID [2020-07-17 22:51:51,373 INFO L263 TraceCheckUtils]: 3: Hoare triple {373#true} call #t~ret2 := main(); {373#true} is VALID [2020-07-17 22:51:51,374 INFO L280 TraceCheckUtils]: 4: Hoare triple {373#true} ~x~0 := 1;~y~0 := 0; {397#(and (<= 0 main_~y~0) (<= 1 main_~x~0))} is VALID [2020-07-17 22:51:51,375 INFO L280 TraceCheckUtils]: 5: Hoare triple {397#(and (<= 0 main_~y~0) (<= 1 main_~x~0))} #t~short1 := ~y~0 < 1000; {397#(and (<= 0 main_~y~0) (<= 1 main_~x~0))} is VALID [2020-07-17 22:51:51,376 INFO L280 TraceCheckUtils]: 6: Hoare triple {397#(and (<= 0 main_~y~0) (<= 1 main_~x~0))} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {397#(and (<= 0 main_~y~0) (<= 1 main_~x~0))} is VALID [2020-07-17 22:51:51,378 INFO L280 TraceCheckUtils]: 7: Hoare triple {397#(and (<= 0 main_~y~0) (<= 1 main_~x~0))} assume !!#t~short1;havoc #t~short1;havoc #t~nondet0;~x~0 := ~x~0 + ~y~0;~y~0 := 1 + ~y~0; {378#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:51,378 INFO L280 TraceCheckUtils]: 8: Hoare triple {378#(<= 1 main_~x~0)} #t~short1 := ~y~0 < 1000; {378#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:51,379 INFO L280 TraceCheckUtils]: 9: Hoare triple {378#(<= 1 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {378#(<= 1 main_~x~0)} is VALID [2020-07-17 22:51:51,380 INFO L280 TraceCheckUtils]: 10: Hoare triple {378#(<= 1 main_~x~0)} assume !!#t~short1;havoc #t~short1;havoc #t~nondet0;~x~0 := ~x~0 + ~y~0;~y~0 := 1 + ~y~0; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,381 INFO L280 TraceCheckUtils]: 11: Hoare triple {379#(<= main_~y~0 main_~x~0)} #t~short1 := ~y~0 < 1000; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,382 INFO L280 TraceCheckUtils]: 12: Hoare triple {379#(<= main_~y~0 main_~x~0)} assume #t~short1;assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647;#t~short1 := 0 != #t~nondet0; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,383 INFO L280 TraceCheckUtils]: 13: Hoare triple {379#(<= main_~y~0 main_~x~0)} assume !#t~short1;havoc #t~short1;havoc #t~nondet0; {379#(<= main_~y~0 main_~x~0)} is VALID [2020-07-17 22:51:51,385 INFO L263 TraceCheckUtils]: 14: Hoare triple {379#(<= main_~y~0 main_~x~0)} call __VERIFIER_assert((if ~x~0 >= ~y~0 then 1 else 0)); {428#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2020-07-17 22:51:51,386 INFO L280 TraceCheckUtils]: 15: Hoare triple {428#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {432#(<= 1 __VERIFIER_assert_~cond)} is VALID [2020-07-17 22:51:51,387 INFO L280 TraceCheckUtils]: 16: Hoare triple {432#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {374#false} is VALID [2020-07-17 22:51:51,387 INFO L280 TraceCheckUtils]: 17: Hoare triple {374#false} assume !false; {374#false} is VALID [2020-07-17 22:51:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:51:51,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 22:51:51,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-17 22:51:51,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660057303] [2020-07-17 22:51:51,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-07-17 22:51:51,391 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:51:51,392 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 10 states. [2020-07-17 22:51:51,426 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 25 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:51,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 22:51:51,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:51:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 22:51:51,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-17 22:51:51,428 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2020-07-17 22:51:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:51,563 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-07-17 22:51:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 22:51:51,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-07-17 22:51:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:51:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-07-17 22:51:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2020-07-17 22:51:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-07-17 22:51:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2020-07-17 22:51:51,566 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 5 states and 14 transitions. [2020-07-17 22:51:51,584 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:51:51,584 INFO L225 Difference]: With dead ends: 19 [2020-07-17 22:51:51,584 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 22:51:51,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-17 22:51:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 22:51:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 22:51:51,586 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:51:51,586 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2020-07-17 22:51:51,586 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-17 22:51:51,587 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-17 22:51:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:51,587 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-17 22:51:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 22:51:51,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:51,588 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:51,588 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-17 22:51:51,588 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-17 22:51:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:51:51,588 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-17 22:51:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 22:51:51,589 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:51,589 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:51:51,589 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:51:51,589 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:51:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 22:51:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 22:51:51,590 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-17 22:51:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:51:51,590 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 22:51:51,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 22:51:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 22:51:51,590 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:51:51,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 22:51:51,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 22:51:51,859 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 22:51:51,859 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 22:51:51,859 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 22:51:51,859 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 22:51:51,860 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 22:51:51,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 22:51:51,860 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 22:51:51,860 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 22:51:51,860 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-17 22:51:51,860 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 22:51:51,860 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-07-17 22:51:51,860 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-07-17 22:51:51,861 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-17 22:51:51,861 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-07-17 22:51:51,861 INFO L268 CegarLoopResult]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2020-07-17 22:51:51,861 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-07-17 22:51:51,861 INFO L264 CegarLoopResult]: At program point L16-5(lines 16 19) the Hoare annotation is: (and (<= main_~y~0 main_~x~0) (<= 0 main_~y~0) (<= 1 main_~x~0)) [2020-07-17 22:51:51,861 INFO L264 CegarLoopResult]: At program point L16-6(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-07-17 22:51:51,861 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 22:51:51,862 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-17 22:51:51,862 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-17 22:51:51,862 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-17 22:51:51,862 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-17 22:51:51,862 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-17 22:51:51,867 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-17 22:51:51,867 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2020-07-17 22:51:51,869 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2020-07-17 22:51:51,869 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-17 22:51:51,869 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-17 22:51:51,869 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-17 22:51:51,869 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-17 22:51:51,872 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-17 22:51:51,872 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2020-07-17 22:51:51,872 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2020-07-17 22:51:51,872 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L7-2 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L16-3 has no Hoare annotation [2020-07-17 22:51:51,873 WARN L170 areAnnotationChecker]: L16-3 has no Hoare annotation [2020-07-17 22:51:51,874 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-17 22:51:51,874 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-17 22:51:51,874 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-17 22:51:51,874 INFO L163 areAnnotationChecker]: CFG has 5 edges. 5 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-17 22:51:51,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 10:51:51 BoogieIcfgContainer [2020-07-17 22:51:51,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 22:51:51,891 INFO L168 Benchmark]: Toolchain (without parser) took 3420.66 ms. Allocated memory was 144.7 MB in the beginning and 247.5 MB in the end (delta: 102.8 MB). Free memory was 101.7 MB in the beginning and 199.6 MB in the end (delta: -97.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2020-07-17 22:51:51,891 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 22:51:51,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.58 ms. Allocated memory is still 144.7 MB. Free memory was 101.2 MB in the beginning and 92.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-17 22:51:51,894 INFO L168 Benchmark]: Boogie Preprocessor took 139.05 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 180.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-17 22:51:51,895 INFO L168 Benchmark]: RCFGBuilder took 354.31 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 164.0 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-17 22:51:51,896 INFO L168 Benchmark]: TraceAbstraction took 2637.81 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 164.0 MB in the beginning and 199.6 MB in the end (delta: -35.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-17 22:51:51,900 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 0.22 ms. Allocated memory is still 144.7 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.58 ms. Allocated memory is still 144.7 MB. Free memory was 101.2 MB in the beginning and 92.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.05 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 92.1 MB in the beginning and 180.7 MB in the end (delta: -88.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.31 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 164.0 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2637.81 ms. Allocated memory was 201.9 MB in the beginning and 247.5 MB in the end (delta: 45.6 MB). Free memory was 164.0 MB in the beginning and 199.6 MB in the end (delta: -35.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (y <= x && 0 <= y) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 15 SDslu, 131 SDs, 0 SdLazy, 51 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 18 HoareAnnotationTreeSize, 10 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 3014 SizeOfPredicates, 4 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...