/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/ps5-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:34:05,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:34:05,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:34:05,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:34:05,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:34:05,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:34:05,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:34:05,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 12:34:05,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:34:05,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:34:05,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:34:05,597 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:34:05,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:34:05,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:34:05,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:34:05,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:34:05,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:34:05,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:34:05,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:34:05,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:34:05,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:34:05,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:34:05,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:34:05,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:34:05,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:34:05,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:34:05,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:34:05,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:34:05,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:34:05,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:34:05,600 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:34:05,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:34:05,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:34:05,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:34:05,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:34:05,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:34:05,914 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:34:05,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound2.c [2021-05-06 12:34:05,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063c9e3e7/b995a89feae84a5fa375fa2e7a7bcb42/FLAGf9409e28b [2021-05-06 12:34:06,279 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:34:06,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound2.c [2021-05-06 12:34:06,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063c9e3e7/b995a89feae84a5fa375fa2e7a7bcb42/FLAGf9409e28b [2021-05-06 12:34:06,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063c9e3e7/b995a89feae84a5fa375fa2e7a7bcb42 [2021-05-06 12:34:06,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:34:06,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:34:06,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:34:06,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:34:06,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:34:06,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559cde56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06, skipping insertion in model container [2021-05-06 12:34:06,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:34:06,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:34:06,846 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/ps5-ll_valuebound2.c[458,471] [2021-05-06 12:34:06,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:34:06,864 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:34:06,893 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/ps5-ll_valuebound2.c[458,471] [2021-05-06 12:34:06,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:34:06,944 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:34:06,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06 WrapperNode [2021-05-06 12:34:06,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:34:06,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:34:06,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:34:06,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:34:06,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (1/1) ... [2021-05-06 12:34:06,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:34:06,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:34:06,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:34:06,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:34:06,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (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 [2021-05-06 12:34:07,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:34:07,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:34:07,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:34:07,081 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:34:07,081 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:34:07,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:34:07,082 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:34:07,082 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:34:07,082 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:34:07,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:34:07,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 12:34:07,083 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:34:07,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:34:07,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:34:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:34:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:34:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:34:07,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:34:07,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:34:07,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:34:07,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:34:07,278 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:34:07,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:34:07 BoogieIcfgContainer [2021-05-06 12:34:07,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:34:07,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:34:07,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:34:07,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:34:07,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:34:06" (1/3) ... [2021-05-06 12:34:07,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42282694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:34:07, skipping insertion in model container [2021-05-06 12:34:07,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:34:06" (2/3) ... [2021-05-06 12:34:07,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42282694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:34:07, skipping insertion in model container [2021-05-06 12:34:07,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:34:07" (3/3) ... [2021-05-06 12:34:07,284 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound2.c [2021-05-06 12:34:07,288 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:34:07,290 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:34:07,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:34:07,315 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:34:07,315 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:34:07,315 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:34:07,315 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:34:07,315 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:34:07,315 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:34:07,315 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:34:07,316 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:34:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 12:34:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 12:34:07,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:34:07,331 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:34:07,331 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:34:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:34:07,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-06 12:34:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:34:07,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873112451] [2021-05-06 12:34:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:34:07,383 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:34:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:34:07,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:34:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:34:07,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:34:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:34:07,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:34:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:34:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:34:07,594 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:34:07,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873112451] [2021-05-06 12:34:07,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873112451] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:34:07,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:34:07,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:34:07,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649471554] [2021-05-06 12:34:07,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:34:07,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:34:07,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:34:07,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:34:07,609 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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) [2021-05-06 12:34:07,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:34:07,724 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-06 12:34:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:34:07,725 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 [2021-05-06 12:34:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:34:07,730 INFO L225 Difference]: With dead ends: 51 [2021-05-06 12:34:07,730 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 12:34:07,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:34:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 12:34:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 12:34:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 12:34:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 12:34:07,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 12:34:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:34:07,789 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 12:34:07,789 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) [2021-05-06 12:34:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 12:34:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 12:34:07,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:34:07,806 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:34:07,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:34:07,806 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:34:07,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:34:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-06 12:34:07,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:34:07,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682098294] [2021-05-06 12:34:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:34:07,809 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:34:07,832 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:34:07,833 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:34:07,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:34:07,843 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:34:07,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:34:07 BoogieIcfgContainer [2021-05-06 12:34:07,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:34:07,845 INFO L168 Benchmark]: Toolchain (without parser) took 1145.61 ms. Allocated memory is still 208.7 MB. Free memory was 174.7 MB in the beginning and 139.4 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:34:07,845 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 208.7 MB. Free memory is still 190.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:34:07,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.83 ms. Allocated memory is still 208.7 MB. Free memory was 174.5 MB in the beginning and 191.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 12:34:07,846 INFO L168 Benchmark]: Boogie Preprocessor took 45.67 ms. Allocated memory is still 208.7 MB. Free memory was 191.9 MB in the beginning and 190.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:34:07,846 INFO L168 Benchmark]: RCFGBuilder took 286.92 ms. Allocated memory is still 208.7 MB. Free memory was 190.0 MB in the beginning and 175.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:34:07,847 INFO L168 Benchmark]: TraceAbstraction took 564.01 ms. Allocated memory is still 208.7 MB. Free memory was 175.6 MB in the beginning and 139.4 MB in the end (delta: 36.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:34:07,849 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 208.7 MB. Free memory is still 190.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.83 ms. Allocated memory is still 208.7 MB. Free memory was 174.5 MB in the beginning and 191.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.67 ms. Allocated memory is still 208.7 MB. Free memory was 191.9 MB in the beginning and 190.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.92 ms. Allocated memory is still 208.7 MB. Free memory was 190.0 MB in the beginning and 175.6 MB in the end (delta: 14.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 564.01 ms. Allocated memory is still 208.7 MB. Free memory was 175.6 MB in the beginning and 139.4 MB in the end (delta: 36.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: 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: [L18] short k; [L19] long long y, x, c; [L20] k = __VERIFIER_nondet_short() [L21] CALL assume_abort_if_not(k>=0 && k<=2) [L7] COND FALSE !(!cond) [L21] RET assume_abort_if_not(k>=0 && k<=2) [L22] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) [L22] RET assume_abort_if_not(k <= 256) [L24] y = 0 [L25] x = 0 [L26] c = 0 [L28] COND TRUE 1 [L29] CALL __VERIFIER_assert(6*y*y*y*y*y + 15*y*y*y*y + 10*y*y*y - 30*x - y == 0) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 522.3ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 24.4ms, AutomataDifference: 132.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 15 SDslu, 3 SDs, 0 SdLazy, 8 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms 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: 47.5ms 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...