/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:07:23,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:07:23,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:07:23,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:07:23,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:07:23,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:07:23,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:07:23,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:07:23,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:07:23,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:07:23,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:07:23,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:07:23,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:07:23,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:07:23,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:07:23,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:07:23,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:07:23,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:07:23,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:07:23,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:07:23,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:07:23,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:07:23,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:07:23,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:07:23,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-16 08:07:23,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-16 08:07:23,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-16 08:07:23,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-16 08:07:23,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-16 08:07:23,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-16 08:07:23,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:07:23,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:07:23,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:07:23,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:07:23,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:07:23,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:07:23,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:07:23,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:07:23,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:07:23,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:07:23,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:07:23,887 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 08:07:23,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:07:23,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:07:23,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:07:23,896 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:07:23,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:07:23,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:07:23,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:07:23,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:07:23,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:07:23,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:07:23,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:07:23,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:07:23,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:07:23,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:07:23,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:07:23,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:07:23,898 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:07:23,898 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:07:24,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:07:24,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:07:24,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:07:24,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:07:24,171 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:07:24,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c [2021-04-16 08:07:24,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6288d6d65/4c82c0ab675649f791d0e989d8c97a4b/FLAGeb394ae78 [2021-04-16 08:07:24,630 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:07:24,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c [2021-04-16 08:07:24,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6288d6d65/4c82c0ab675649f791d0e989d8c97a4b/FLAGeb394ae78 [2021-04-16 08:07:25,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6288d6d65/4c82c0ab675649f791d0e989d8c97a4b [2021-04-16 08:07:25,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:07:25,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:07:25,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:25,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:07:25,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:07:25,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c097fb1 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 08:07:25,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:07:25,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:07:25,270 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_valuebound20.c[524,537] [2021-04-16 08:07:25,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:25,310 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:07:25,322 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_valuebound20.c[524,537] [2021-04-16 08:07:25,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:25,357 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:07:25,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25 WrapperNode [2021-04-16 08:07:25,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:25,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:07:25,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:07:25,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:07:25,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (1/1) ... [2021-04-16 08:07:25,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:07:25,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:07:25,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:07:25,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:07:25,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (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 08:07:25,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:07:25,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:07:25,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:07:25,547 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:07:25,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:07:25,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:07:25,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:07:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:07:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:07:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:07:25,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:07:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:07:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:07:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:07:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:07:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:07:25,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:07:25,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:07:25,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:07:25,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:07:25,818 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:07:25,818 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 08:07:25,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:25 BoogieIcfgContainer [2021-04-16 08:07:25,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:07:25,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:07:25,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:07:25,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:07:25,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:07:25" (1/3) ... [2021-04-16 08:07:25,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dd7233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:25, skipping insertion in model container [2021-04-16 08:07:25,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:25" (2/3) ... [2021-04-16 08:07:25,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49dd7233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:25, skipping insertion in model container [2021-04-16 08:07:25,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:25" (3/3) ... [2021-04-16 08:07:25,824 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound20.c [2021-04-16 08:07:25,845 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:07:25,848 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:07:25,871 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:07:25,892 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:07:25,893 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:07:25,893 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:07:25,893 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:07:25,893 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:07:25,893 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:07:25,893 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:07:25,893 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:07:25,912 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 08:07:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:07:25,919 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:25,920 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 08:07:25,920 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times [2021-04-16 08:07:25,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:25,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221390534] [2021-04-16 08:07:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:25,980 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,046 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,048 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:07:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:07:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:07:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,108 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:07:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-04-16 08:07:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:26,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:26,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:26,124 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 08:07:26,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221390534] [2021-04-16 08:07:26,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:07:26,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:07:26,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873720608] [2021-04-16 08:07:26,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:07:26,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:07:26,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:07:26,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:26,140 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 08:07:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:07:26,270 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-04-16 08:07:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:07:26,272 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 08:07:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:07:26,278 INFO L225 Difference]: With dead ends: 57 [2021-04-16 08:07:26,278 INFO L226 Difference]: Without dead ends: 27 [2021-04-16 08:07:26,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-04-16 08:07:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-04-16 08:07:26,331 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 08:07:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-04-16 08:07:26,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-04-16 08:07:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:07:26,335 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-04-16 08:07:26,335 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 08:07:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-04-16 08:07:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:07:26,337 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:26,337 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 08:07:26,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:07:26,339 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times [2021-04-16 08:07:26,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:26,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226712654] [2021-04-16 08:07:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:26,347 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:26,382 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:07:26,382 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:07:26,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:07:26,395 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:07:26,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:07:26 BoogieIcfgContainer [2021-04-16 08:07:26,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:07:26,399 INFO L168 Benchmark]: Toolchain (without parser) took 1334.08 ms. Allocated memory is still 197.1 MB. Free memory was 162.8 MB in the beginning and 124.5 MB in the end (delta: 38.3 MB). Peak memory consumption was 38.1 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:26,400 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 197.1 MB. Free memory is still 178.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:07:26,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.20 ms. Allocated memory is still 197.1 MB. Free memory was 162.7 MB in the beginning and 152.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:26,404 INFO L168 Benchmark]: Boogie Preprocessor took 88.78 ms. Allocated memory is still 197.1 MB. Free memory was 152.6 MB in the beginning and 180.6 MB in the end (delta: -27.9 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:26,405 INFO L168 Benchmark]: RCFGBuilder took 371.02 ms. Allocated memory is still 197.1 MB. Free memory was 180.6 MB in the beginning and 164.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:26,406 INFO L168 Benchmark]: TraceAbstraction took 575.47 ms. Allocated memory is still 197.1 MB. Free memory was 164.8 MB in the beginning and 124.5 MB in the end (delta: 40.4 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:26,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 197.1 MB. Free memory is still 178.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 294.20 ms. Allocated memory is still 197.1 MB. Free memory was 162.7 MB in the beginning and 152.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.78 ms. Allocated memory is still 197.1 MB. Free memory was 152.6 MB in the beginning and 180.6 MB in the end (delta: -27.9 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 371.02 ms. Allocated memory is still 197.1 MB. Free memory was 180.6 MB in the beginning and 164.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 575.47 ms. Allocated memory is still 197.1 MB. Free memory was 164.8 MB in the beginning and 124.5 MB in the end (delta: 40.4 MB). Peak memory consumption was 39.8 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<=20) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=20) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=20) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=20) [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: 495.6ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 18.5ms, AutomataDifference: 151.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms 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: 40.1ms 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...