/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/divbin_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:42:33,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:42:33,782 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:42:33,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:42:34,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:42:34,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:42:34,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:42:34,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:42:34,020 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:42:34,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:42:34,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:42:34,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:42:34,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:42:34,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:42:34,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:42:34,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:42:34,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:42:34,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:42:34,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:42:34,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:42:34,089 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 00:42:34,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:42:34,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:42:34,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:42:34,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:42:34,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:42:34,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:42:34,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:42:34,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:42:34,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:42:34,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:42:34,129 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:42:34,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:42:34,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:42:34,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:42:34,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:42:34,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:42:34,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:42:34,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:42:34,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:42:34,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:42:34,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:42:34,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:42:34,131 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:42:34,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:42:34,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:42:34,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:42:34,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:42:34,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:42:34,512 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:42:34,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2021-05-03 00:42:34,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7337d25/4954253fae874ec79f508ad486701a09/FLAG0502fe219 [2021-05-03 00:42:35,000 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:42:35,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2021-05-03 00:42:35,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7337d25/4954253fae874ec79f508ad486701a09/FLAG0502fe219 [2021-05-03 00:42:35,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba7337d25/4954253fae874ec79f508ad486701a09 [2021-05-03 00:42:35,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:42:35,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:42:35,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:35,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:42:35,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:42:35,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb3fe8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35, skipping insertion in model container [2021-05-03 00:42:35,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:42:35,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:42:35,595 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/divbin_unwindbound50.i[958,971] [2021-05-03 00:42:35,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:35,633 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:42:35,650 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/divbin_unwindbound50.i[958,971] [2021-05-03 00:42:35,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:42:35,678 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:42:35,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35 WrapperNode [2021-05-03 00:42:35,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:42:35,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:42:35,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:42:35,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:42:35,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (1/1) ... [2021-05-03 00:42:35,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:42:35,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:42:35,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:42:35,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:42:35,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (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 00:42:35,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:42:35,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:42:35,842 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:42:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:42:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:42:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:42:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:42:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:42:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-03 00:42:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-03 00:42:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:42:35,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:42:35,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-03 00:42:35,845 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:42:35,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:42:35,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:42:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:42:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:42:35,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:42:35,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:42:35,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:42:35,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:42:36,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:42:36,209 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 00:42:36,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:36 BoogieIcfgContainer [2021-05-03 00:42:36,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:42:36,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:42:36,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:42:36,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:42:36,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:42:35" (1/3) ... [2021-05-03 00:42:36,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7901d89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:36, skipping insertion in model container [2021-05-03 00:42:36,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:42:35" (2/3) ... [2021-05-03 00:42:36,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7901d89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:42:36, skipping insertion in model container [2021-05-03 00:42:36,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:42:36" (3/3) ... [2021-05-03 00:42:36,221 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2021-05-03 00:42:36,229 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:42:36,233 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:42:36,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:42:36,279 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:42:36,279 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:42:36,279 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:42:36,279 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:42:36,280 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:42:36,280 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:42:36,280 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:42:36,280 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:42:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 00:42:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:42:36,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:36,323 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 00:42:36,323 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash 878397729, now seen corresponding path program 1 times [2021-05-03 00:42:36,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:36,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360351614] [2021-05-03 00:42:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:36,408 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:36,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:42:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:36,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:42:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:36,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:42:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:42:36,596 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 00:42:36,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:42:36,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360351614] [2021-05-03 00:42:36,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1360351614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:42:36,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:42:36,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:42:36,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847684051] [2021-05-03 00:42:36,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:42:36,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:42:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:42:36,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:36,617 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 00:42:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:42:36,792 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-05-03 00:42:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:42:36,795 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 00:42:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:42:36,803 INFO L225 Difference]: With dead ends: 60 [2021-05-03 00:42:36,804 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:42:36,807 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:42:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:42:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-03 00:42:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 00:42:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-03 00:42:36,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-03 00:42:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:42:36,859 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-03 00:42:36,859 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 00:42:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-03 00:42:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 00:42:36,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:42:36,861 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, 1, 1] [2021-05-03 00:42:36,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:42:36,862 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:42:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:42:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash 994169231, now seen corresponding path program 1 times [2021-05-03 00:42:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:42:36,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121629220] [2021-05-03 00:42:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:42:36,870 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:42:36,903 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:42:36,903 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:42:36,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:42:36,923 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:42:36,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:42:36 BoogieIcfgContainer [2021-05-03 00:42:36,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:42:36,927 INFO L168 Benchmark]: Toolchain (without parser) took 1500.28 ms. Allocated memory was 127.9 MB in the beginning and 172.0 MB in the end (delta: 44.0 MB). Free memory was 93.6 MB in the beginning and 143.6 MB in the end (delta: -50.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:36,928 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 127.9 MB. Free memory is still 110.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:36,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.10 ms. Allocated memory is still 127.9 MB. Free memory was 93.4 MB in the beginning and 105.7 MB in the end (delta: -12.3 MB). Peak memory consumption was 6.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:36,929 INFO L168 Benchmark]: Boogie Preprocessor took 82.84 ms. Allocated memory was 127.9 MB in the beginning and 172.0 MB in the end (delta: 44.0 MB). Free memory was 105.7 MB in the beginning and 154.9 MB in the end (delta: -49.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:36,931 INFO L168 Benchmark]: RCFGBuilder took 446.78 ms. Allocated memory is still 172.0 MB. Free memory was 154.9 MB in the beginning and 139.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:42:36,931 INFO L168 Benchmark]: TraceAbstraction took 712.87 ms. Allocated memory is still 172.0 MB. Free memory was 138.8 MB in the beginning and 143.6 MB in the end (delta: -4.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:42:36,937 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 127.9 MB. Free memory is still 110.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.10 ms. Allocated memory is still 127.9 MB. Free memory was 93.4 MB in the beginning and 105.7 MB in the end (delta: -12.3 MB). Peak memory consumption was 6.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.84 ms. Allocated memory was 127.9 MB in the beginning and 172.0 MB in the end (delta: 44.0 MB). Free memory was 105.7 MB in the beginning and 154.9 MB in the end (delta: -49.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 446.78 ms. Allocated memory is still 172.0 MB. Free memory was 154.9 MB in the beginning and 139.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 712.87 ms. Allocated memory is still 172.0 MB. Free memory was 138.8 MB in the beginning and 143.6 MB in the end (delta: -4.8 MB). There was no memory consumed. 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: [L25] int counter = 0; [L27] unsigned A, B; [L28] unsigned q, r, b; [L29] A = __VERIFIER_nondet_unsigned_int() [L30] B = __VERIFIER_nondet_unsigned_int() [L31] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L32] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B >= 1) [L33] q = 0 [L34] r = A [L35] b = B [L36] EXPR counter++ [L36] COND FALSE !(counter++<50) [L40] EXPR counter++ [L40] COND FALSE !(counter++<50) [L50] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 632.5ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 29.3ms, AutomataDifference: 202.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 21 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 94.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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: 38.8ms 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...