/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:47:38,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:47:38,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:47:38,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:47:38,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:47:38,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:47:38,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:47:38,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:47:38,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:47:38,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:47:38,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:47:38,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:47:38,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:47:38,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:47:38,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:47:38,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:47:38,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:47:38,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:47:38,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:47:38,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:47:38,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:47:38,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:47:38,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:47:38,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:47:38,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:47:38,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:47:38,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:47:38,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:47:38,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:47:38,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:47:38,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:47:38,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:47:38,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:47:38,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:47:38,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:47:38,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:47:38,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:47:38,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:47:38,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:47:38,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:47:38,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:47:38,595 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:47:38,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:47:38,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:47:38,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:47:38,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:47:38,650 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:47:38,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:47:38,650 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:47:38,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:47:38,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:47:38,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:47:38,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:47:38,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:47:38,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:47:38,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:47:38,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:47:38,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:47:38,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:47:38,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:47:38,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:47:38,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:47:38,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:47:38,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:38,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:47:38,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:47:38,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:47:38,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:47:38,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:47:38,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:47:38,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:47:38,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:47:39,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:47:39,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:47:39,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:47:39,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:47:39,081 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:47:39,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-11-06 22:47:39,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd25a9d4/07c77feeca384827a1d21b39a2a41fe8/FLAGf8fbebe75 [2020-11-06 22:47:39,836 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:47:39,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-11-06 22:47:39,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd25a9d4/07c77feeca384827a1d21b39a2a41fe8/FLAGf8fbebe75 [2020-11-06 22:47:40,183 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd25a9d4/07c77feeca384827a1d21b39a2a41fe8 [2020-11-06 22:47:40,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:47:40,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:47:40,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:40,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:47:40,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:47:40,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e2f24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40, skipping insertion in model container [2020-11-06 22:47:40,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:47:40,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:47:40,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:40,422 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:47:40,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:47:40,459 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:47:40,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40 WrapperNode [2020-11-06 22:47:40,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:47:40,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:47:40,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:47:40,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:47:40,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... [2020-11-06 22:47:40,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:47:40,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:47:40,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:47:40,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:47:40,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:47:40,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:47:40,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:47:40,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:47:40,585 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:47:40,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:47:40,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:47:40,585 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:47:40,585 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:47:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:47:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:47:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-11-06 22:47:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:47:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:47:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:47:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:47:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:47:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:47:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:47:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:47:40,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:47:40,883 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:47:40,883 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:47:40,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:40 BoogieIcfgContainer [2020-11-06 22:47:40,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:47:40,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:47:40,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:47:40,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:47:40,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:47:40" (1/3) ... [2020-11-06 22:47:40,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b75f06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:40, skipping insertion in model container [2020-11-06 22:47:40,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:47:40" (2/3) ... [2020-11-06 22:47:40,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b75f06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:47:40, skipping insertion in model container [2020-11-06 22:47:40,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:47:40" (3/3) ... [2020-11-06 22:47:40,897 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-11-06 22:47:40,917 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:47:40,923 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:47:40,946 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:47:41,023 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:47:41,023 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:47:41,024 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:47:41,024 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:47:41,024 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:47:41,024 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:47:41,024 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:47:41,024 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:47:41,074 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-06 22:47:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:47:41,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:41,090 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:41,092 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 451539001, now seen corresponding path program 1 times [2020-11-06 22:47:41,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:41,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175881445] [2020-11-06 22:47:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:41,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:47:41,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634469508] [2020-11-06 22:47:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-06 22:47:41,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:47:41,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175881445] [2020-11-06 22:47:41,558 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:47:41,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634469508] [2020-11-06 22:47:41,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:47:41,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-06 22:47:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206947973] [2020-11-06 22:47:41,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-06 22:47:41,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-06 22:47:41,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-06 22:47:41,592 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-06 22:47:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:41,633 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2020-11-06 22:47:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-06 22:47:41,635 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2020-11-06 22:47:41,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:41,651 INFO L225 Difference]: With dead ends: 55 [2020-11-06 22:47:41,652 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:47:41,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-06 22:47:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:47:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-06 22:47:41,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:47:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-06 22:47:41,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2020-11-06 22:47:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:41,701 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-06 22:47:41,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-06 22:47:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-06 22:47:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:47:41,703 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:41,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:41,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-06 22:47:41,917 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:41,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1624006843, now seen corresponding path program 1 times [2020-11-06 22:47:41,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:41,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833575235] [2020-11-06 22:47:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:41,938 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:47:41,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232891341] [2020-11-06 22:47:41,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:42,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:47:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:47:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833575235] [2020-11-06 22:47:46,218 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:47:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232891341] [2020-11-06 22:47:46,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:47:46,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:47:46,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763005159] [2020-11-06 22:47:46,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:47:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:47:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:47:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:47:46,222 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-11-06 22:47:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:47:48,387 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-11-06 22:47:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:47:48,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-06 22:47:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:47:48,393 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:47:48,394 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:47:48,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:47:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:47:48,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-11-06 22:47:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-06 22:47:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-11-06 22:47:48,405 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-11-06 22:47:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:47:48,407 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-11-06 22:47:48,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:47:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-11-06 22:47:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:47:48,409 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:47:48,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:47:48,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:48,610 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:47:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:47:48,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2043930870, now seen corresponding path program 1 times [2020-11-06 22:47:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:47:48,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929648266] [2020-11-06 22:47:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:47:48,641 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-06 22:47:48,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601640165] [2020-11-06 22:47:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:47:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:47:48,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:47:48,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929648266] [2020-11-06 22:47:48,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-06 22:47:48,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601640165] [2020-11-06 22:47:48,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-11-06 22:47:48,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:47:48,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-06 22:47:48,800 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-11-06 22:47:48,800 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:47:49,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:47:49,022 WARN L253 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-06 22:47:49,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:47:49 BoogieIcfgContainer [2020-11-06 22:47:49,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:47:49,026 INFO L168 Benchmark]: Toolchain (without parser) took 8836.20 ms. Allocated memory is still 155.2 MB. Free memory was 130.8 MB in the beginning and 71.4 MB in the end (delta: 59.4 MB). Peak memory consumption was 60.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:47:49,026 INFO L168 Benchmark]: CDTParser took 1.39 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:47:49,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.00 ms. Allocated memory is still 155.2 MB. Free memory was 130.2 MB in the beginning and 120.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:47:49,028 INFO L168 Benchmark]: Boogie Preprocessor took 38.60 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 119.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:47:49,031 INFO L168 Benchmark]: RCFGBuilder took 382.94 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 136.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:47:49,035 INFO L168 Benchmark]: TraceAbstraction took 8135.23 ms. Allocated memory is still 155.2 MB. Free memory was 136.4 MB in the beginning and 71.4 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:47:49,038 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.39 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.00 ms. Allocated memory is still 155.2 MB. Free memory was 130.2 MB in the beginning and 120.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.60 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 119.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 382.94 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 136.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 16.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8135.23 ms. Allocated memory is still 155.2 MB. Free memory was 136.4 MB in the beginning and 71.4 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint, overapproximation of to_int at line 22. Possible FailurePath: [L20] int A, R; [L21] int u, v, r; [L22] A = __VERIFIER_nondet_double() [L23] R = __VERIFIER_nondet_double() [L25] CALL assume_abort_if_not((R - 1) * (R - 1) < A) [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((R - 1) * (R - 1) < A) [L27] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) [L29] u = 2 * R + 1 [L30] v = 1 [L31] r = R * R - A [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L34] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L35] COND TRUE !(r != 0) [L47] CALL __VERIFIER_assert(4*A == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] CALL reach_error() [L5] __assert_fail("0", "fermat2.c", 5, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 7.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 7 SDslu, 62 SDs, 0 SdLazy, 29 SolverSat, 0 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 2156 SizeOfPredicates, 3 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...