/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:30:16,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:30:16,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:30:16,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 12:30:16,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 12:30:16,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 12:30:16,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 12:30:16,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 12:30:16,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 12:30:16,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 12:30:16,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 12:30:16,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 12:30:16,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:30:16,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:30:16,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:30:16,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:30:16,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:30:16,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:30:16,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:30:16,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:30:16,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:30:16,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:30:16,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:30:16,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:30:16,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 12:30:16,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 12:30:16,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 12:30:16,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 12:30:16,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 12:30:16,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 12:30:16,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 12:30:16,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 12:30:16,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 12:30:16,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 12:30:16,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 12:30:16,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 12:30:16,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 12:30:16,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 12:30:16,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:30:16,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:30:16,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:30:16,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:30:16,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:30:16,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:30:16,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:30:16,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:30:16,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:30:16,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:30:16,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:30:16,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:30:16,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:30:16,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:30:16,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:30:16,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:30:16,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:30:16,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:30:16,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:30:16,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:30:16,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:30:16,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:30:16,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:30:16,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:30:16,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:30:16,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:30:16,844 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:30:16,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:30:17,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:30:17,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:30:17,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:30:17,193 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:30:17,194 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:30:17,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_valuebound20.c [2021-05-06 12:30:17,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48615e36/d166c69eccea42f2b758eb77d763fb94/FLAG4deed1086 [2021-05-06 12:30:17,612 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:30:17,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_valuebound20.c [2021-05-06 12:30:17,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48615e36/d166c69eccea42f2b758eb77d763fb94/FLAG4deed1086 [2021-05-06 12:30:17,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48615e36/d166c69eccea42f2b758eb77d763fb94 [2021-05-06 12:30:17,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:30:17,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:30:17,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:30:17,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:30:17,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:30:17,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a8b58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17, skipping insertion in model container [2021-05-06 12:30:17,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:30:17,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:30:17,804 WARN L224 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/freire2_valuebound20.c[709,722] [2021-05-06 12:30:17,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:30:17,875 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:30:17,908 WARN L224 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/freire2_valuebound20.c[709,722] [2021-05-06 12:30:17,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:30:17,946 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:30:17,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17 WrapperNode [2021-05-06 12:30:17,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:30:17,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:30:17,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:30:17,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:30:17,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (1/1) ... [2021-05-06 12:30:17,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:30:17,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:30:17,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:30:17,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:30:17,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (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 [2021-05-06 12:30:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:30:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:30:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:30:18,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:30:18,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:30:18,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:30:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:30:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:30:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:30:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:30:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-06 12:30:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:30:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:30:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:30:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:30:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:30:18,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:30:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:30:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:30:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:30:18,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:30:18,344 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:30:18,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:30:18 BoogieIcfgContainer [2021-05-06 12:30:18,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:30:18,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:30:18,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:30:18,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:30:18,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:30:17" (1/3) ... [2021-05-06 12:30:18,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417797eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:30:18, skipping insertion in model container [2021-05-06 12:30:18,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:30:17" (2/3) ... [2021-05-06 12:30:18,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417797eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:30:18, skipping insertion in model container [2021-05-06 12:30:18,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:30:18" (3/3) ... [2021-05-06 12:30:18,376 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_valuebound20.c [2021-05-06 12:30:18,382 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:30:18,385 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:30:18,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:30:18,423 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:30:18,423 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:30:18,423 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:30:18,423 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:30:18,423 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:30:18,423 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:30:18,423 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:30:18,423 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:30:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 12:30:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 12:30:18,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:30:18,447 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:30:18,448 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:30:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:30:18,453 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-06 12:30:18,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:30:18,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208996127] [2021-05-06 12:30:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:30:18,515 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:30:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:18,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:30:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:18,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:30:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:30:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:30:18,747 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:30:18,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208996127] [2021-05-06 12:30:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [208996127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:30:18,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:30:18,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:30:18,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665449437] [2021-05-06 12:30:18,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:30:18,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:30:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:30:18,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:30:18,768 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:30:18,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:30:18,911 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-06 12:30:18,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:30:18,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 12:30:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:30:18,920 INFO L225 Difference]: With dead ends: 53 [2021-05-06 12:30:18,920 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 12:30:18,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:30:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 12:30:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 12:30:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 12:30:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 12:30:18,999 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 12:30:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:30:19,000 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 12:30:19,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 12:30:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 12:30:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 12:30:19,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:30:19,001 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:30:19,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:30:19,002 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:30:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:30:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-06 12:30:19,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:30:19,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034230591] [2021-05-06 12:30:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:30:19,010 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:30:19,037 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:30:19,037 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:30:19,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:30:19,053 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:30:19,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:30:19 BoogieIcfgContainer [2021-05-06 12:30:19,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:30:19,055 INFO L168 Benchmark]: Toolchain (without parser) took 1419.36 ms. Allocated memory is still 232.8 MB. Free memory was 197.9 MB in the beginning and 212.1 MB in the end (delta: -14.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:30:19,056 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 232.8 MB. Free memory is still 214.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:30:19,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.43 ms. Allocated memory is still 232.8 MB. Free memory was 197.7 MB in the beginning and 215.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:19,058 INFO L168 Benchmark]: Boogie Preprocessor took 43.44 ms. Allocated memory is still 232.8 MB. Free memory was 215.1 MB in the beginning and 213.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:19,059 INFO L168 Benchmark]: RCFGBuilder took 361.93 ms. Allocated memory is still 232.8 MB. Free memory was 213.5 MB in the beginning and 198.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:30:19,060 INFO L168 Benchmark]: TraceAbstraction took 683.38 ms. Allocated memory is still 232.8 MB. Free memory was 198.5 MB in the beginning and 212.1 MB in the end (delta: -13.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:30:19,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 232.8 MB. Free memory is still 214.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 310.43 ms. Allocated memory is still 232.8 MB. Free memory was 197.7 MB in the beginning and 215.1 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.44 ms. Allocated memory is still 232.8 MB. Free memory was 215.1 MB in the beginning and 213.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 361.93 ms. Allocated memory is still 232.8 MB. Free memory was 213.5 MB in the beginning and 198.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 683.38 ms. Allocated memory is still 232.8 MB. Free memory was 198.5 MB in the beginning and 212.1 MB in the end (delta: -13.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: 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, overapproximation of to_int at line 34, overapproximation of someBinaryDOUBLEComparisonOperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=20) [L14] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a>=0 && a<=20) [L29] x = a [L30] s = 3.25 [L31] r = 1 [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 621.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 11.3ms, AutomataDifference: 169.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 15 SDslu, 3 SDs, 0 SdLazy, 10 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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: 62.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...