/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/divbin2_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:42:23,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:42:23,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:42:23,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:42:23,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:42:23,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:42:23,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:42:23,373 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 00:42:23,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:42:23,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:42:23,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:42:23,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:42:23,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:42:23,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:42:23,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:42:23,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:42:23,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:42:23,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:42:23,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:42:23,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:42:23,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:42:23,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:42:23,390 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:42:23,390 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:42:23,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:42:23,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:42:23,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:42:23,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:42:23,694 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:42:23,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i [2021-05-03 00:42:23,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f12f0bd/abc9d31f24af4b909fa279f4d7d4e6d0/FLAG9b167f7c2 [2021-05-03 00:42:24,149 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:42:24,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_valuebound50.i [2021-05-03 00:42:24,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f12f0bd/abc9d31f24af4b909fa279f4d7d4e6d0/FLAG9b167f7c2 [2021-05-03 00:42:24,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69f12f0bd/abc9d31f24af4b909fa279f4d7d4e6d0 [2021-05-03 00:42:24,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:42:24,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:42:24,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:24,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:42:24,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:42:24,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e44784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24, skipping insertion in model container [2021-05-03 00:42:24,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:42:24,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:42:24,323 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/divbin2_valuebound50.i[959,972] [2021-05-03 00:42:24,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:24,351 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:42:24,366 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/divbin2_valuebound50.i[959,972] [2021-05-03 00:42:24,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:24,423 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:42:24,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24 WrapperNode [2021-05-03 00:42:24,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:24,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:42:24,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:42:24,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:42:24,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (1/1) ... [2021-05-03 00:42:24,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:42:24,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:42:24,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:42:24,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:42:24,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (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 00:42:24,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:42:24,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:42:24,536 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:42:24,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:42:24,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:42:24,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:42:24,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:42:24,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:42:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:42:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:42:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:42:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:42:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-03 00:42:24,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:42:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:42:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:42:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:42:24,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:42:24,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:42:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:42:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:42:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:42:24,824 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:42:24,825 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:42:24,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:24 BoogieIcfgContainer [2021-05-03 00:42:24,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:42:24,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:42:24,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:42:24,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:42:24,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:42:24" (1/3) ... [2021-05-03 00:42:24,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2f56c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:24, skipping insertion in model container [2021-05-03 00:42:24,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:24" (2/3) ... [2021-05-03 00:42:24,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2f56c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:24, skipping insertion in model container [2021-05-03 00:42:24,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:24" (3/3) ... [2021-05-03 00:42:24,832 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound50.i [2021-05-03 00:42:24,837 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:42:24,840 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:42:24,859 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:42:24,882 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:42:24,882 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:42:24,882 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:42:24,882 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:42:24,882 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:42:24,883 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:42:24,883 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:42:24,883 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:42:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-03 00:42:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 00:42:24,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:24,906 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:24,907 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1171333446, now seen corresponding path program 1 times [2021-05-03 00:42:24,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:24,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730444422] [2021-05-03 00:42:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:24,971 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:25,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:25,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:42:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:25,164 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 00:42:25,166 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:25,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730444422] [2021-05-03 00:42:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [730444422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:25,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:25,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:42:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331379890] [2021-05-03 00:42:25,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:42:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:25,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:42:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:25,192 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2021-05-03 00:42:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:25,290 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-05-03 00:42:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:42:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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 18 [2021-05-03 00:42:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:25,298 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:42:25,298 INFO L226 Difference]: Without dead ends: 25 [2021-05-03 00:42:25,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-03 00:42:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-03 00:42:25,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:42:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-03 00:42:25,346 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2021-05-03 00:42:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:25,346 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-03 00:42:25,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (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) [2021-05-03 00:42:25,346 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-03 00:42:25,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 00:42:25,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:25,347 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:42:25,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:42:25,348 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:25,348 INFO L82 PathProgramCache]: Analyzing trace with hash -73515422, now seen corresponding path program 1 times [2021-05-03 00:42:25,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:25,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866927899] [2021-05-03 00:42:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:25,351 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:25,362 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:42:25,362 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:42:25,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:42:25,375 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:42:25,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:42:25 BoogieIcfgContainer [2021-05-03 00:42:25,376 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:42:25,378 INFO L168 Benchmark]: Toolchain (without parser) took 1200.12 ms. Allocated memory is still 200.3 MB. Free memory was 166.3 MB in the beginning and 136.3 MB in the end (delta: 30.0 MB). Peak memory consumption was 29.9 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:25,378 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 200.3 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:25,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.39 ms. Allocated memory is still 200.3 MB. Free memory was 166.2 MB in the beginning and 184.8 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:25,380 INFO L168 Benchmark]: Boogie Preprocessor took 37.97 ms. Allocated memory is still 200.3 MB. Free memory was 184.6 MB in the beginning and 183.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:25,380 INFO L168 Benchmark]: RCFGBuilder took 360.15 ms. Allocated memory is still 200.3 MB. Free memory was 183.1 MB in the beginning and 167.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:25,381 INFO L168 Benchmark]: TraceAbstraction took 548.33 ms. Allocated memory is still 200.3 MB. Free memory was 167.4 MB in the beginning and 136.3 MB in the end (delta: 31.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:25,385 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 200.3 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 245.39 ms. Allocated memory is still 200.3 MB. Free memory was 166.2 MB in the beginning and 184.8 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.97 ms. Allocated memory is still 200.3 MB. Free memory was 184.6 MB in the beginning and 183.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.15 ms. Allocated memory is still 200.3 MB. Free memory was 183.1 MB in the beginning and 167.8 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 548.33 ms. Allocated memory is still 200.3 MB. Free memory was 167.4 MB in the beginning and 136.3 MB in the end (delta: 31.1 MB). Peak memory consumption was 30.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_unsigned_int() [L29] CALL assume_abort_if_not(A>=0 && A<=50) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=50) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 486.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.0ms, AutomataDifference: 127.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 29 SDtfs, 20 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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: 33.8ms 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...