/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:43:48,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:43:48,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:43:48,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:43:48,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:43:48,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:43:48,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:43:48,665 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:43:48,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:43:48,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:43:48,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:43:48,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:43:48,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:43:48,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:43:48,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:43:48,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:43:48,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:43:48,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:43:48,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:43:48,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:43:48,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:43:48,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:43:48,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:43:48,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:43:48,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:43:48,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:43:48,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:43:48,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:43:48,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:43:48,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:43:48,689 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:43:48,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:43:49,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:43:49,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:43:49,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:43:49,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:43:49,087 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:43:49,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c [2021-05-03 00:43:49,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdb6b25a/e778205dc4464f1e9f8d2f4efe90aa38/FLAG47e0296c4 [2021-05-03 00:43:49,721 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:43:49,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c [2021-05-03 00:43:49,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdb6b25a/e778205dc4464f1e9f8d2f4efe90aa38/FLAG47e0296c4 [2021-05-03 00:43:50,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bdb6b25a/e778205dc4464f1e9f8d2f4efe90aa38 [2021-05-03 00:43:50,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:43:50,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:43:50,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:43:50,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:43:50,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:43:50,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb41821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50, skipping insertion in model container [2021-05-03 00:43:50,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:43:50,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:43:50,287 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_unwindbound20.c[709,722] [2021-05-03 00:43:50,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:43:50,336 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:43:50,351 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_unwindbound20.c[709,722] [2021-05-03 00:43:50,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:43:50,380 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:43:50,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50 WrapperNode [2021-05-03 00:43:50,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:43:50,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:43:50,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:43:50,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:43:50,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (1/1) ... [2021-05-03 00:43:50,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:43:50,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:43:50,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:43:50,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:43:50,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (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 [2021-05-03 00:43:50,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:43:50,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:43:50,611 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:43:50,611 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:43:50,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:43:50,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:43:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:43:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:43:50,612 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:43:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:43:50,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-03 00:43:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:43:50,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:43:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:43:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:43:50,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:43:50,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:43:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:43:50,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:43:50,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:43:51,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:43:51,051 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:43:51,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:43:51 BoogieIcfgContainer [2021-05-03 00:43:51,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:43:51,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:43:51,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:43:51,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:43:51,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:43:50" (1/3) ... [2021-05-03 00:43:51,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e662d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:43:51, skipping insertion in model container [2021-05-03 00:43:51,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:50" (2/3) ... [2021-05-03 00:43:51,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e662d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:43:51, skipping insertion in model container [2021-05-03 00:43:51,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:43:51" (3/3) ... [2021-05-03 00:43:51,081 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2021-05-03 00:43:51,108 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:43:51,113 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:43:51,161 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:43:51,204 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:43:51,205 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:43:51,205 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:43:51,205 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:43:51,205 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:43:51,205 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:43:51,205 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:43:51,205 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:43:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:43:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:43:51,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:51,246 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:51,247 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-03 00:43:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:51,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225765951] [2021-05-03 00:43:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:51,350 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:43:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:51,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:43:51,651 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225765951] [2021-05-03 00:43:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225765951] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:51,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:51,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:43:51,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750140027] [2021-05-03 00:43:51,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:43:51,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:51,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:43:51,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:43:51,682 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:51,874 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-03 00:43:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:43:51,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:43:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:51,884 INFO L225 Difference]: With dead ends: 47 [2021-05-03 00:43:51,885 INFO L226 Difference]: Without dead ends: 22 [2021-05-03 00:43:51,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:43:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-03 00:43:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-03 00:43:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:43:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-03 00:43:51,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-03 00:43:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:51,932 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-03 00:43:51,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:43:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-03 00:43:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:43:51,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:51,934 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:51,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:43:51,935 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-03 00:43:51,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:51,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97946825] [2021-05-03 00:43:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:51,939 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:43:51,952 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:43:51,952 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:43:51,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:43:51,972 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:43:51,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:43:51 BoogieIcfgContainer [2021-05-03 00:43:51,972 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:43:51,974 INFO L168 Benchmark]: Toolchain (without parser) took 1879.89 ms. Allocated memory is still 184.5 MB. Free memory was 151.1 MB in the beginning and 118.3 MB in the end (delta: 32.8 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:51,975 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 184.5 MB. Free memory is still 167.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:51,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.16 ms. Allocated memory is still 184.5 MB. Free memory was 150.8 MB in the beginning and 140.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:51,976 INFO L168 Benchmark]: Boogie Preprocessor took 66.03 ms. Allocated memory is still 184.5 MB. Free memory was 140.1 MB in the beginning and 138.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:51,977 INFO L168 Benchmark]: RCFGBuilder took 603.68 ms. Allocated memory is still 184.5 MB. Free memory was 138.5 MB in the beginning and 155.0 MB in the end (delta: -16.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:51,977 INFO L168 Benchmark]: TraceAbstraction took 916.90 ms. Allocated memory is still 184.5 MB. Free memory was 154.4 MB in the beginning and 118.8 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:51,979 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 184.5 MB. Free memory is still 167.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.16 ms. Allocated memory is still 184.5 MB. Free memory was 150.8 MB in the beginning and 140.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 66.03 ms. Allocated memory is still 184.5 MB. Free memory was 140.1 MB in the beginning and 138.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 603.68 ms. Allocated memory is still 184.5 MB. Free memory was 138.5 MB in the beginning and 155.0 MB in the end (delta: -16.4 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 916.90 ms. Allocated memory is still 184.5 MB. Free memory was 154.4 MB in the beginning and 118.8 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. 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 45. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 [L33] EXPR counter++ [L33] COND FALSE !(counter++<20) [L45] 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 756.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 25.0ms, AutomataDifference: 222.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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: 29.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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...