/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/fermat1-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:07:08,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:07:08,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:07:08,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:07:08,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:07:08,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:07:08,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:07:08,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:07:08,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:07:08,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:07:08,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:07:08,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:07:08,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:07:08,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:07:08,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:07:08,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:07:08,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:07:08,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:07:08,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:07:08,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:07:08,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:07:08,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:07:08,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:07:08,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:07:08,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 08:07:08,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:07:08,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:07:08,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:07:08,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:07:08,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:07:08,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:07:08,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:07:08,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:07:08,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:07:08,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:07:08,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:07:08,236 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 08:07:08,251 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:07:08,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:07:08,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:07:08,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:07:08,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:07:08,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:07:08,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:07:08,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:07:08,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:07:08,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:07:08,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:07:08,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:07:08,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:07:08,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:07:08,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:07:08,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:07:08,256 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:07:08,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:07:08,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:07:08,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:07:08,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:07:08,811 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:07:08,812 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:07:08,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound2.c [2021-04-16 08:07:08,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47958002c/ec4abbc7b71b4fc483edc950feea97ec/FLAG822187c78 [2021-04-16 08:07:09,412 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:07:09,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound2.c [2021-04-16 08:07:09,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47958002c/ec4abbc7b71b4fc483edc950feea97ec/FLAG822187c78 [2021-04-16 08:07:09,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47958002c/ec4abbc7b71b4fc483edc950feea97ec [2021-04-16 08:07:09,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:07:09,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:07:09,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:09,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:07:09,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:07:09,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:09" (1/1) ... [2021-04-16 08:07:09,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f03fe34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:09, skipping insertion in model container [2021-04-16 08:07:09,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:07:09" (1/1) ... [2021-04-16 08:07:09,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:07:09,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:07:10,000 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/fermat1-ll_valuebound2.c[535,548] [2021-04-16 08:07:10,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:10,027 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:07:10,047 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/fermat1-ll_valuebound2.c[535,548] [2021-04-16 08:07:10,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:07:10,086 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:07:10,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10 WrapperNode [2021-04-16 08:07:10,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:07:10,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:07:10,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:07:10,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:07:10,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (1/1) ... [2021-04-16 08:07:10,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:07:10,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:07:10,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:07:10,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:07:10,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (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 08:07:10,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:07:10,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:07:10,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:07:10,180 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:07:10,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:07:10,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:07:10,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:07:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:07:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:07:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:07:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 08:07:10,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:07:10,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:07:10,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:07:10,399 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-04-16 08:07:10,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:10 BoogieIcfgContainer [2021-04-16 08:07:10,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:07:10,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:07:10,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:07:10,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:07:10,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:07:09" (1/3) ... [2021-04-16 08:07:10,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113a14c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:10, skipping insertion in model container [2021-04-16 08:07:10,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:07:10" (2/3) ... [2021-04-16 08:07:10,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113a14c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:07:10, skipping insertion in model container [2021-04-16 08:07:10,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:07:10" (3/3) ... [2021-04-16 08:07:10,407 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound2.c [2021-04-16 08:07:10,411 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:07:10,414 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:07:10,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:07:10,444 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:07:10,444 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:07:10,444 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:07:10,444 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:07:10,444 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:07:10,445 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:07:10,445 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:07:10,445 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:07:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-04-16 08:07:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:07:10,463 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:10,464 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 08:07:10,464 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1718462925, now seen corresponding path program 1 times [2021-04-16 08:07:10,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:10,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388157217] [2021-04-16 08:07:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:10,528 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:10,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:07:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:10,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:07:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:10,679 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,680 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,680 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,681 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-04-16 08:07:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:10,685 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,686 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,686 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-04-16 08:07:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:10,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,692 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,692 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-04-16 08:07:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:07:10,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:07:10,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:07:10,700 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 08:07:10,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388157217] [2021-04-16 08:07:10,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:07:10,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:07:10,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76616280] [2021-04-16 08:07:10,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:07:10,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:07:10,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:07:10,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:10,719 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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 08:07:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:07:10,823 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2021-04-16 08:07:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:07:10,825 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 08:07:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:07:10,831 INFO L225 Difference]: With dead ends: 67 [2021-04-16 08:07:10,832 INFO L226 Difference]: Without dead ends: 32 [2021-04-16 08:07:10,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:07:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-04-16 08:07:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-04-16 08:07:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-04-16 08:07:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-04-16 08:07:10,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-04-16 08:07:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:07:10,876 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-04-16 08:07:10,876 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 08:07:10,877 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-04-16 08:07:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-16 08:07:10,878 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:07:10,878 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 08:07:10,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:07:10,879 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:07:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:07:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash 657160210, now seen corresponding path program 1 times [2021-04-16 08:07:10,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:07:10,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879345031] [2021-04-16 08:07:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:07:10,884 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:07:10,901 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:07:10,902 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:07:10,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:07:10,915 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:07:10,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:07:10 BoogieIcfgContainer [2021-04-16 08:07:10,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:07:10,917 INFO L168 Benchmark]: Toolchain (without parser) took 1099.27 ms. Allocated memory is still 158.3 MB. Free memory was 123.8 MB in the beginning and 80.1 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.9 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:10,918 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 158.3 MB. Free memory was 140.4 MB in the beginning and 140.3 MB in the end (delta: 87.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:07:10,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.04 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 141.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:10,919 INFO L168 Benchmark]: Boogie Preprocessor took 26.34 ms. Allocated memory is still 158.3 MB. Free memory was 141.5 MB in the beginning and 139.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:10,920 INFO L168 Benchmark]: RCFGBuilder took 285.54 ms. Allocated memory is still 158.3 MB. Free memory was 139.8 MB in the beginning and 123.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:10,920 INFO L168 Benchmark]: TraceAbstraction took 514.39 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 80.1 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:07:10,922 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 158.3 MB. Free memory was 140.4 MB in the beginning and 140.3 MB in the end (delta: 87.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.04 ms. Allocated memory is still 158.3 MB. Free memory was 123.7 MB in the beginning and 141.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.34 ms. Allocated memory is still 158.3 MB. Free memory was 141.5 MB in the beginning and 139.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 285.54 ms. Allocated memory is still 158.3 MB. Free memory was 139.8 MB in the beginning and 123.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 514.39 ms. Allocated memory is still 158.3 MB. Free memory was 123.1 MB in the beginning and 80.1 MB in the end (delta: 43.0 MB). Peak memory consumption was 43.0 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<=2) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(A>=0 && A<=2) [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(R>=0 && R<=2) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not(R>=0 && R<=2) [L26] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) [L28] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 464.2ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 10.8ms, AutomataDifference: 126.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36 SDtfs, 22 SDslu, 3 SDs, 0 SdLazy, 11 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 58.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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: 28.9ms 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...