/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/bresenham-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:40:14,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:40:14,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:40:14,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:40:14,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:40:14,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:40:14,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:40:14,331 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 00:40:14,343 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:40:14,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:40:14,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:40:14,355 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:40:14,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:40:14,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:40:14,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:40:14,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:40:14,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:40:14,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:40:14,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:40:14,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:40:14,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:40:14,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:40:14,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:40:14,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:40:14,359 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:40:14,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:40:14,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:40:14,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:40:14,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:40:14,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:40:14,651 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:40:14,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2021-05-03 00:40:14,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7124b321/f23d8a97793c45e48aedf55d2f313adb/FLAG53a384a25 [2021-05-03 00:40:15,121 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:40:15,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2021-05-03 00:40:15,127 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7124b321/f23d8a97793c45e48aedf55d2f313adb/FLAG53a384a25 [2021-05-03 00:40:15,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7124b321/f23d8a97793c45e48aedf55d2f313adb [2021-05-03 00:40:15,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:40:15,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:40:15,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:40:15,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:40:15,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:40:15,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66dda82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15, skipping insertion in model container [2021-05-03 00:40:15,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:40:15,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:40:15,308 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/bresenham-ll_valuebound50.c[597,610] [2021-05-03 00:40:15,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:40:15,342 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:40:15,394 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/bresenham-ll_valuebound50.c[597,610] [2021-05-03 00:40:15,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:40:15,435 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:40:15,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15 WrapperNode [2021-05-03 00:40:15,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:40:15,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:40:15,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:40:15,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:40:15,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (1/1) ... [2021-05-03 00:40:15,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:40:15,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:40:15,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:40:15,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:40:15,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (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 00:40:15,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:40:15,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:40:15,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:40:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:40:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:40:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:40:15,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:40:15,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:40:15,541 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:40:15,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:40:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:40:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:40:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:40:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:40:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:40:15,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:40:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:40:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:40:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:40:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:40:15,814 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:40:15,814 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:40:15,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:40:15 BoogieIcfgContainer [2021-05-03 00:40:15,815 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:40:15,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:40:15,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:40:15,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:40:15,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:40:15" (1/3) ... [2021-05-03 00:40:15,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab10ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:40:15, skipping insertion in model container [2021-05-03 00:40:15,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:40:15" (2/3) ... [2021-05-03 00:40:15,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab10ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:40:15, skipping insertion in model container [2021-05-03 00:40:15,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:40:15" (3/3) ... [2021-05-03 00:40:15,833 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.c [2021-05-03 00:40:15,838 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:40:15,841 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:40:15,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:40:15,889 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:40:15,889 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:40:15,889 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:40:15,889 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:40:15,889 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:40:15,889 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:40:15,889 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:40:15,889 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:40:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:40:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:40:15,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:15,913 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:15,914 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2021-05-03 00:40:15,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172561961] [2021-05-03 00:40:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:15,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:40:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:16,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:40:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:16,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:40:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:16,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:40:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:40:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:40:16,234 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:40:16,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172561961] [2021-05-03 00:40:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172561961] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:40:16,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:40:16,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:40:16,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385501295] [2021-05-03 00:40:16,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:40:16,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:40:16,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:40:16,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:40:16,251 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:40:16,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:40:16,334 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-05-03 00:40:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:40:16,336 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-03 00:40:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:40:16,341 INFO L225 Difference]: With dead ends: 57 [2021-05-03 00:40:16,341 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 00:40:16,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:40:16,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 00:40:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 00:40:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-03 00:40:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-03 00:40:16,390 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-03 00:40:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:40:16,390 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-03 00:40:16,390 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:40:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-03 00:40:16,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:40:16,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:40:16,392 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:40:16,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:40:16,392 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:40:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:40:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2021-05-03 00:40:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:40:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681204354] [2021-05-03 00:40:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:40:16,399 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:40:16,452 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:40:16,452 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:40:16,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:40:16,469 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:40:16,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:40:16 BoogieIcfgContainer [2021-05-03 00:40:16,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:40:16,472 INFO L168 Benchmark]: Toolchain (without parser) took 1322.59 ms. Allocated memory is still 220.2 MB. Free memory was 185.6 MB in the beginning and 201.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 36.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:40:16,472 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 220.2 MB. Free memory is still 202.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:40:16,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.26 ms. Allocated memory is still 220.2 MB. Free memory was 185.4 MB in the beginning and 203.7 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:40:16,474 INFO L168 Benchmark]: Boogie Preprocessor took 35.84 ms. Allocated memory is still 220.2 MB. Free memory was 203.7 MB in the beginning and 202.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:40:16,474 INFO L168 Benchmark]: RCFGBuilder took 341.80 ms. Allocated memory is still 220.2 MB. Free memory was 202.4 MB in the beginning and 186.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:40:16,475 INFO L168 Benchmark]: TraceAbstraction took 653.36 ms. Allocated memory is still 220.2 MB. Free memory was 186.3 MB in the beginning and 201.8 MB in the end (delta: -15.6 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:40:16,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 220.2 MB. Free memory is still 202.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.26 ms. Allocated memory is still 220.2 MB. Free memory was 185.4 MB in the beginning and 203.7 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.84 ms. Allocated memory is still 220.2 MB. Free memory was 203.7 MB in the beginning and 202.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 341.80 ms. Allocated memory is still 220.2 MB. Free memory was 202.4 MB in the beginning and 186.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 653.36 ms. Allocated memory is still 220.2 MB. Free memory was 186.3 MB in the beginning and 201.8 MB in the end (delta: -15.6 MB). Peak memory consumption was 37.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L22] int X, Y; [L23] long long x, y, v, xy, yx; [L24] X = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(X>=0 && X<=50) [L11] COND FALSE !(!cond) [L25] RET assume_abort_if_not(X>=0 && X<=50) [L26] Y = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(Y>=0 && Y<=50) [L11] COND FALSE !(!cond) [L27] RET assume_abort_if_not(Y>=0 && Y<=50) [L28] v = ((long long) 2 * Y) - X [L29] y = 0 [L30] x = 0 [L32] COND TRUE 1 [L33] yx = (long long) Y*x [L34] xy = (long long) X*y [L35] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 569.1ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 11.2ms, AutomataDifference: 102.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 20 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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: 35.5ms 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...