/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/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:39:39,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:39:39,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:39:39,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:39:39,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:39:39,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:39:39,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:39:39,338 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 00:39:39,356 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:39:39,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:39:39,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:39:39,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:39:39,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:39:39,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:39:39,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:39:39,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:39:39,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:39:39,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:39:39,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:39:39,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:39:39,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:39:39,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:39:39,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:39:39,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:39:39,363 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:39:39,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:39:39,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:39:39,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:39:39,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:39:39,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:39:39,750 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:39:39,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2021-05-03 00:39:39,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c07aad/ac38607c962a4f7a9d14d56a478dda09/FLAG19ac738de [2021-05-03 00:39:40,369 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:39:40,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2021-05-03 00:39:40,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c07aad/ac38607c962a4f7a9d14d56a478dda09/FLAG19ac738de [2021-05-03 00:39:40,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c30c07aad/ac38607c962a4f7a9d14d56a478dda09 [2021-05-03 00:39:40,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:39:40,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:39:40,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:40,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:39:40,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:39:40,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:40" (1/1) ... [2021-05-03 00:39:40,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f90fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:40, skipping insertion in model container [2021-05-03 00:39:40,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:40" (1/1) ... [2021-05-03 00:39:40,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:39:40,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:39:40,954 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/mannadiv.c[573,586] [2021-05-03 00:39:40,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:40,980 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:39:40,994 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/mannadiv.c[573,586] [2021-05-03 00:39:41,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:41,021 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:39:41,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41 WrapperNode [2021-05-03 00:39:41,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:41,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:39:41,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:39:41,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:39:41,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (1/1) ... [2021-05-03 00:39:41,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:39:41,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:39:41,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:39:41,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:39:41,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (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 00:39:41,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:39:41,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:39:41,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:39:41,187 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:39:41,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:39:41,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:39:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:39:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:39:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:39:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:39:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:39:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:39:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:39:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:39:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:39:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:39:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:39:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:39:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:39:41,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:39:41,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:39:41,519 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:39:41,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:41 BoogieIcfgContainer [2021-05-03 00:39:41,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:39:41,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:39:41,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:39:41,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:39:41,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:39:40" (1/3) ... [2021-05-03 00:39:41,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65172162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:41, skipping insertion in model container [2021-05-03 00:39:41,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:41" (2/3) ... [2021-05-03 00:39:41,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65172162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:41, skipping insertion in model container [2021-05-03 00:39:41,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:41" (3/3) ... [2021-05-03 00:39:41,528 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2021-05-03 00:39:41,533 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:39:41,537 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:39:41,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:39:41,582 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:39:41,582 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:39:41,582 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:39:41,583 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:39:41,583 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:39:41,583 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:39:41,583 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:39:41,583 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:39:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 00:39:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:39:41,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:41,617 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:41,618 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -786972844, now seen corresponding path program 1 times [2021-05-03 00:39:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:41,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699429445] [2021-05-03 00:39:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:41,691 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:41,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:39:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:41,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:39:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:41,975 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 00:39:41,977 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:41,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699429445] [2021-05-03 00:39:41,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699429445] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:41,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:41,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:39:41,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551033652] [2021-05-03 00:39:41,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:39:41,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:39:41,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:42,000 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 00:39:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:42,152 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-03 00:39:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:39:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 22 [2021-05-03 00:39:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:42,164 INFO L225 Difference]: With dead ends: 51 [2021-05-03 00:39:42,164 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:39:42,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:39:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 00:39:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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 00:39:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-03 00:39:42,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-03 00:39:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:42,203 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-03 00:39:42,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 00:39:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-03 00:39:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:39:42,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:42,205 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:42,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:39:42,205 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:42,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1131020600, now seen corresponding path program 1 times [2021-05-03 00:39:42,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:42,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496124077] [2021-05-03 00:39:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:42,210 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:42,221 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:39:42,222 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:39:42,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:39:42,242 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:39:42,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:39:42 BoogieIcfgContainer [2021-05-03 00:39:42,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:39:42,244 INFO L168 Benchmark]: Toolchain (without parser) took 1446.64 ms. Allocated memory is still 189.8 MB. Free memory was 155.3 MB in the beginning and 123.8 MB in the end (delta: 31.6 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:42,245 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 189.8 MB. Free memory is still 172.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:39:42,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.20 ms. Allocated memory is still 189.8 MB. Free memory was 155.1 MB in the beginning and 145.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:42,245 INFO L168 Benchmark]: Boogie Preprocessor took 74.67 ms. Allocated memory is still 189.8 MB. Free memory was 145.5 MB in the beginning and 173.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:42,246 INFO L168 Benchmark]: RCFGBuilder took 419.03 ms. Allocated memory is still 189.8 MB. Free memory was 173.7 MB in the beginning and 159.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:42,246 INFO L168 Benchmark]: TraceAbstraction took 720.99 ms. Allocated memory is still 189.8 MB. Free memory was 159.0 MB in the beginning and 123.8 MB in the end (delta: 35.2 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:42,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 189.8 MB. Free memory is still 172.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.20 ms. Allocated memory is still 189.8 MB. Free memory was 155.1 MB in the beginning and 145.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.67 ms. Allocated memory is still 189.8 MB. Free memory was 145.5 MB in the beginning and 173.7 MB in the end (delta: -28.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 419.03 ms. Allocated memory is still 189.8 MB. Free memory was 173.7 MB in the beginning and 159.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 720.99 ms. Allocated memory is still 189.8 MB. Free memory was 159.0 MB in the beginning and 123.8 MB in the end (delta: 35.2 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 18]: 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: [L23] int x1, x2; [L24] int y1, y2, y3; [L25] x1 = __VERIFIER_nondet_int() [L26] x2 = __VERIFIER_nondet_int() [L28] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L28] RET assume_abort_if_not(x1 >= 0) [L29] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x2 != 0) [L31] y1 = 0 [L32] y2 = 0 [L33] y3 = x1 [L35] COND TRUE 1 [L36] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 646.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 20.2ms, AutomataDifference: 180.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 17 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 22.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...