/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:07:24,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:07:24,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:07:24,335 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:07:24,336 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:07:24,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:07:24,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:07:24,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:07:24,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:07:24,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:07:24,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:07:24,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:07:24,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:07:24,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:07:24,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:07:24,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:07:24,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:07:24,363 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:07:24,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:07:24,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:07:24,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:07:24,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:07:24,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:07:24,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:07:24,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:07:24,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:07:24,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:07:24,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:07:24,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:07:24,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:07:24,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:07:24,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:07:24,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:07:24,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:07:24,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:07:24,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:07:24,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:07:24,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:07:24,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:07:24,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:07:24,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:07:24,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:07:24,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:07:24,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:07:24,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:07:24,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:07:24,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:07:24,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:07:24,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:07:24,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:07:24,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:07:24,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:07:24,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:07:24,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:07:24,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:07:24,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:07:24,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:07:24,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:07:24,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:07:24,424 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:07:24,424 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:07:24,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:07:24,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:07:24,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:07:24,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:07:24,761 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:07:24,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c [2021-04-16 08:07:24,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1194d59cb/b240ae780f1b44c2b77a1e1a8fdf64b2/FLAG3df2f01e9 [2021-04-16 08:07:25,346 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:07:25,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c [2021-04-16 08:07:25,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1194d59cb/b240ae780f1b44c2b77a1e1a8fdf64b2/FLAG3df2f01e9 [2021-04-16 08:07:25,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1194d59cb/b240ae780f1b44c2b77a1e1a8fdf64b2 [2021-04-16 08:07:25,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:07:25,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:07:25,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:25,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:07:25,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:07:25,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa1d933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25, skipping insertion in model container [2021-04-16 08:07:25,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:07:25,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:07:26,044 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c[524,537] [2021-04-16 08:07:26,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:26,072 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:07:26,087 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound5.c[524,537] [2021-04-16 08:07:26,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:26,122 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:07:26,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26 WrapperNode [2021-04-16 08:07:26,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:26,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:07:26,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:07:26,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:07:26,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... [2021-04-16 08:07:26,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:07:26,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:07:26,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:07:26,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:07:26,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:07:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:07:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:07:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:07:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:07:26,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:07:26,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:07:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:07:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:07:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:07:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:07:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:07:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:07:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:07:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:07:26,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:07:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:07:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:07:26,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:07:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:07:26,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:07:26,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:07:26,605 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 08:07:26,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:26 BoogieIcfgContainer [2021-04-16 08:07:26,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:07:26,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:07:26,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:07:26,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:07:26,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:07:25" (1/3) ... [2021-04-16 08:07:26,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12726caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:26, skipping insertion in model container [2021-04-16 08:07:26,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:26" (2/3) ... [2021-04-16 08:07:26,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12726caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:26, skipping insertion in model container [2021-04-16 08:07:26,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:26" (3/3) ... [2021-04-16 08:07:26,624 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound5.c [2021-04-16 08:07:26,629 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:07:26,632 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:07:26,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:07:26,677 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:07:26,677 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:07:26,677 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:07:26,677 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:07:26,677 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:07:26,678 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:07:26,678 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:07:26,678 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:07:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-04-16 08:07:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:07:26,702 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:26,703 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:07:26,703 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times [2021-04-16 08:07:26,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:26,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50869463] [2021-04-16 08:07:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:26,779 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,909 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:07:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:07:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:07:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,986 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:07:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,990 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,991 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-04-16 08:07:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-04-16 08:07:27,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50869463] [2021-04-16 08:07:27,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:07:27,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:07:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979353295] [2021-04-16 08:07:27,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:07:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:07:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:07:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:27,031 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:07:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:07:27,217 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-04-16 08:07:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:07:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-04-16 08:07:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:07:27,226 INFO L225 Difference]: With dead ends: 57 [2021-04-16 08:07:27,226 INFO L226 Difference]: Without dead ends: 27 [2021-04-16 08:07:27,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-16 08:07:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-04-16 08:07:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-04-16 08:07:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-04-16 08:07:27,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-04-16 08:07:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:07:27,287 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-04-16 08:07:27,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-04-16 08:07:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-04-16 08:07:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:07:27,289 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:27,289 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:07:27,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:07:27,293 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times [2021-04-16 08:07:27,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:27,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766090460] [2021-04-16 08:07:27,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:27,304 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:27,325 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:07:27,326 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:07:27,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:07:27,341 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:07:27,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:07:27 BoogieIcfgContainer [2021-04-16 08:07:27,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:07:27,343 INFO L168 Benchmark]: Toolchain (without parser) took 1501.73 ms. Allocated memory is still 190.8 MB. Free memory was 157.0 MB in the beginning and 120.0 MB in the end (delta: 37.0 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:27,343 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 190.8 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:07:27,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.45 ms. Allocated memory is still 190.8 MB. Free memory was 156.8 MB in the beginning and 147.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:27,344 INFO L168 Benchmark]: Boogie Preprocessor took 46.26 ms. Allocated memory is still 190.8 MB. Free memory was 147.0 MB in the beginning and 145.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:27,345 INFO L168 Benchmark]: RCFGBuilder took 434.72 ms. Allocated memory is still 190.8 MB. Free memory was 145.4 MB in the beginning and 160.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:27,346 INFO L168 Benchmark]: TraceAbstraction took 734.15 ms. Allocated memory is still 190.8 MB. Free memory was 160.4 MB in the beginning and 120.0 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:27,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 190.8 MB. Free memory is still 173.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.45 ms. Allocated memory is still 190.8 MB. Free memory was 156.8 MB in the beginning and 147.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.26 ms. Allocated memory is still 190.8 MB. Free memory was 147.0 MB in the beginning and 145.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 434.72 ms. Allocated memory is still 190.8 MB. Free memory was 145.4 MB in the beginning and 160.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 734.15 ms. Allocated memory is still 190.8 MB. Free memory was 160.4 MB in the beginning and 120.0 MB in the end (delta: 40.4 MB). Peak memory consumption was 40.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int A, R; [L21] long long u, v, r; [L22] A = __VERIFIER_nondet_int() [L23] CALL assume_abort_if_not(A>=0 && A<=5) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=5) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=5) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=5) [L27] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L29] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A % 2 == 1) [L31] u = ((long long) 2 * R) + 1 [L32] v = 1 [L33] r = ((long long) R * R) - A [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 655.7ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 13.9ms, AutomataDifference: 213.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...