/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 06:34:53,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 06:34:53,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 06:34:53,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 06:34:53,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 06:34:53,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 06:34:53,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 06:34:53,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 06:34:53,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 06:34:53,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 06:34:53,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 06:34:53,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 06:34:53,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 06:34:53,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 06:34:53,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 06:34:53,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 06:34:53,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 06:34:53,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 06:34:53,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 06:34:53,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 06:34:53,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 06:34:53,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 06:34:53,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 06:34:53,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 06:34:53,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 06:34:53,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-18 06:34:53,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-18 06:34:53,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-18 06:34:53,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-18 06:34:53,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-18 06:34:53,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-18 06:34:53,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-18 06:34:53,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-18 06:34:53,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 06:34:53,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 06:34:53,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 06:34:53,220 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 06:34:53,234 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 06:34:53,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 06:34:53,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 06:34:53,239 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 06:34:53,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 06:34:53,239 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 06:34:53,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 06:34:53,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 06:34:53,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 06:34:53,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 06:34:53,241 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 06:34:53,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 06:34:53,242 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 06:34:53,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 06:34:53,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 06:34:53,243 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 06:34:53,243 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 06:34:53,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 06:34:53,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 06:34:53,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 06:34:53,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 06:34:53,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 06:34:53,244 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-18 06:34:53,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 06:34:53,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 06:34:53,587 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 06:34:53,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 06:34:53,590 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 06:34:53,591 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-18 06:34:53,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bfebe61/0551f37582d244fe92b3d9817025b3c0/FLAG8645a74e7 [2020-07-18 06:34:54,310 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 06:34:54,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-18 06:34:54,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bfebe61/0551f37582d244fe92b3d9817025b3c0/FLAG8645a74e7 [2020-07-18 06:34:54,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bfebe61/0551f37582d244fe92b3d9817025b3c0 [2020-07-18 06:34:54,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 06:34:54,681 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 06:34:54,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 06:34:54,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 06:34:54,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 06:34:54,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 06:34:54" (1/1) ... [2020-07-18 06:34:54,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55139f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:54, skipping insertion in model container [2020-07-18 06:34:54,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 06:34:54" (1/1) ... [2020-07-18 06:34:54,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 06:34:54,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 06:34:54,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 06:34:54,987 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 06:34:55,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 06:34:55,023 INFO L208 MainTranslator]: Completed translation [2020-07-18 06:34:55,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55 WrapperNode [2020-07-18 06:34:55,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 06:34:55,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 06:34:55,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 06:34:55,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 06:34:55,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (1/1) ... [2020-07-18 06:34:55,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 06:34:55,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 06:34:55,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 06:34:55,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 06:34:55,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (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 [2020-07-18 06:34:55,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 06:34:55,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 06:34:55,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 06:34:55,228 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-18 06:34:55,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 06:34:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 06:34:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 06:34:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-18 06:34:55,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 06:34:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 06:34:55,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 06:34:55,473 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 06:34:55,474 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-18 06:34:55,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 06:34:55 BoogieIcfgContainer [2020-07-18 06:34:55,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 06:34:55,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 06:34:55,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 06:34:55,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 06:34:55,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 06:34:54" (1/3) ... [2020-07-18 06:34:55,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd78b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 06:34:55, skipping insertion in model container [2020-07-18 06:34:55,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:34:55" (2/3) ... [2020-07-18 06:34:55,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd78b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 06:34:55, skipping insertion in model container [2020-07-18 06:34:55,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 06:34:55" (3/3) ... [2020-07-18 06:34:55,500 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-07-18 06:34:55,514 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 06:34:55,530 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 06:34:55,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 06:34:55,585 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 06:34:55,586 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 06:34:55,586 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-18 06:34:55,586 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 06:34:55,586 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 06:34:55,587 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 06:34:55,587 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 06:34:55,587 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 06:34:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-18 06:34:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-18 06:34:55,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:34:55,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:34:55,627 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:34:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:34:55,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times [2020-07-18 06:34:55,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:34:55,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104517587] [2020-07-18 06:34:55,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:34:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:34:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:34:55,902 INFO L280 TraceCheckUtils]: 0: Hoare triple {32#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {27#true} is VALID [2020-07-18 06:34:55,903 INFO L280 TraceCheckUtils]: 1: Hoare triple {27#true} assume true; {27#true} is VALID [2020-07-18 06:34:55,903 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {27#true} {27#true} #46#return; {27#true} is VALID [2020-07-18 06:34:55,912 INFO L263 TraceCheckUtils]: 0: Hoare triple {27#true} call ULTIMATE.init(); {32#(= ~x~0 |old(~x~0)|)} is VALID [2020-07-18 06:34:55,912 INFO L280 TraceCheckUtils]: 1: Hoare triple {32#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {27#true} is VALID [2020-07-18 06:34:55,913 INFO L280 TraceCheckUtils]: 2: Hoare triple {27#true} assume true; {27#true} is VALID [2020-07-18 06:34:55,913 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {27#true} {27#true} #46#return; {27#true} is VALID [2020-07-18 06:34:55,914 INFO L263 TraceCheckUtils]: 4: Hoare triple {27#true} call #t~ret0 := main(); {27#true} is VALID [2020-07-18 06:34:55,922 INFO L280 TraceCheckUtils]: 5: Hoare triple {27#true} assume false; {28#false} is VALID [2020-07-18 06:34:55,923 INFO L263 TraceCheckUtils]: 6: Hoare triple {28#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {28#false} is VALID [2020-07-18 06:34:55,923 INFO L280 TraceCheckUtils]: 7: Hoare triple {28#false} ~cond := #in~cond; {28#false} is VALID [2020-07-18 06:34:55,924 INFO L280 TraceCheckUtils]: 8: Hoare triple {28#false} assume 0 == ~cond; {28#false} is VALID [2020-07-18 06:34:55,925 INFO L280 TraceCheckUtils]: 9: Hoare triple {28#false} assume !false; {28#false} is VALID [2020-07-18 06:34:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 06:34:55,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104517587] [2020-07-18 06:34:55,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 06:34:55,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-18 06:34:55,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555830734] [2020-07-18 06:34:55,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-18 06:34:55,950 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 06:34:55,956 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-18 06:34:55,991 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 10 edges. 10 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:34:55,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-18 06:34:55,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 06:34:56,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-18 06:34:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-18 06:34:56,006 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-07-18 06:34:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:34:56,230 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2020-07-18 06:34:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-18 06:34:56,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-18 06:34:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 06:34:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-18 06:34:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2020-07-18 06:34:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-18 06:34:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2020-07-18 06:34:56,253 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 55 transitions. [2020-07-18 06:34:56,371 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:34:56,385 INFO L225 Difference]: With dead ends: 39 [2020-07-18 06:34:56,385 INFO L226 Difference]: Without dead ends: 20 [2020-07-18 06:34:56,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-18 06:34:56,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-18 06:34:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-07-18 06:34:56,468 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 06:34:56,468 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand 18 states. [2020-07-18 06:34:56,469 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand 18 states. [2020-07-18 06:34:56,469 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 18 states. [2020-07-18 06:34:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:34:56,475 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-07-18 06:34:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-18 06:34:56,476 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:34:56,477 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:34:56,477 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 20 states. [2020-07-18 06:34:56,477 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 20 states. [2020-07-18 06:34:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:34:56,486 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-07-18 06:34:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-18 06:34:56,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:34:56,488 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:34:56,488 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 06:34:56,488 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 06:34:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-18 06:34:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-18 06:34:56,492 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10 [2020-07-18 06:34:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 06:34:56,493 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-18 06:34:56,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-18 06:34:56,493 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 18 states and 18 transitions. [2020-07-18 06:34:56,528 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:34:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-18 06:34:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-18 06:34:56,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:34:56,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:34:56,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 06:34:56,531 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:34:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:34:56,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times [2020-07-18 06:34:56,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:34:56,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454763589] [2020-07-18 06:34:56,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:34:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 06:34:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 06:34:56,602 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-18 06:34:56,602 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-18 06:34:56,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 06:34:56,628 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-18 06:34:56,628 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-18 06:34:56,628 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-18 06:34:56,628 WARN L170 areAnnotationChecker]: evalENTRY has no Hoare annotation [2020-07-18 06:34:56,628 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 06:34:56,629 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 06:34:56,629 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 06:34:56,629 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 06:34:56,629 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 06:34:56,629 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-18 06:34:56,630 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-18 06:34:56,630 WARN L170 areAnnotationChecker]: L14-1 has no Hoare annotation [2020-07-18 06:34:56,630 WARN L170 areAnnotationChecker]: L15 has no Hoare annotation [2020-07-18 06:34:56,630 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 06:34:56,630 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 06:34:56,631 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 06:34:56,631 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 06:34:56,631 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-18 06:34:56,631 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-18 06:34:56,631 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-18 06:34:56,631 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-18 06:34:56,632 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-18 06:34:56,632 WARN L170 areAnnotationChecker]: evalEXIT has no Hoare annotation [2020-07-18 06:34:56,632 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-18 06:34:56,632 WARN L170 areAnnotationChecker]: L30 has no Hoare annotation [2020-07-18 06:34:56,632 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-18 06:34:56,633 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2020-07-18 06:34:56,633 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 06:34:56,633 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 06:34:56,633 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-18 06:34:56,634 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-18 06:34:56,634 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:34:56,634 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:34:56,634 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-18 06:34:56,634 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. [2020-07-18 06:34:56,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.07 06:34:56 BoogieIcfgContainer [2020-07-18 06:34:56,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-18 06:34:56,644 INFO L168 Benchmark]: Toolchain (without parser) took 1963.27 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 104.2 MB in the beginning and 107.4 MB in the end (delta: -3.2 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2020-07-18 06:34:56,645 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 139.5 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-18 06:34:56,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.97 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-18 06:34:56,647 INFO L168 Benchmark]: Boogie Preprocessor took 130.67 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 94.4 MB in the beginning and 183.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-07-18 06:34:56,648 INFO L168 Benchmark]: RCFGBuilder took 325.73 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 168.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. [2020-07-18 06:34:56,649 INFO L168 Benchmark]: TraceAbstraction took 1154.71 ms. Allocated memory is still 204.5 MB. Free memory was 168.7 MB in the beginning and 108.3 MB in the end (delta: 60.4 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2020-07-18 06:34:56,653 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 0.39 ms. Allocated memory is still 139.5 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.97 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.67 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 94.4 MB in the beginning and 183.5 MB in the end (delta: -89.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.73 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 168.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1154.71 ms. Allocated memory is still 204.5 MB. Free memory was 168.7 MB in the beginning and 108.3 MB in the end (delta: 60.4 MB). Peak memory consumption was 60.4 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: [L10] int x=0; VAL [\old(x)=2, x=0] [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 VAL [\old(x)=0, x=0] [L15] x=1 VAL [\old(x)=0, x=1] [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 7 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...