/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/cohencu-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:21:21,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:21:21,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:21:21,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:21:21,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:21:21,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:21:21,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:21:21,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:21:21,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:21:21,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:21:21,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:21:21,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:21:21,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:21:21,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:21:21,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:21:21,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:21:21,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:21:21,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:21:21,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:21:21,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:21:21,606 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 12:21:21,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:21:21,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:21:21,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:21:21,649 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:21:21,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:21:21,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:21:21,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:21:21,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:21:21,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:21:21,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:21:21,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:21:21,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:21:21,651 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:21:21,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:21:21,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:21:21,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:21:21,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:21:21,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:21:21,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:21:21,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:21:21,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:21:21,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:21:21,652 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:21:21,652 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:21:21,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:21:21,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:21:21,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:21:21,999 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:21:22,000 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:21:22,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2021-05-06 12:21:22,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71bc4d87b/3f4db9bccea24c1ca59663bbff85031a/FLAGed3b558c9 [2021-05-06 12:21:22,447 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:21:22,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2021-05-06 12:21:22,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71bc4d87b/3f4db9bccea24c1ca59663bbff85031a/FLAGed3b558c9 [2021-05-06 12:21:22,847 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71bc4d87b/3f4db9bccea24c1ca59663bbff85031a [2021-05-06 12:21:22,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:21:22,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:21:22,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:21:22,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:21:22,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:21:22,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:21:22" (1/1) ... [2021-05-06 12:21:22,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:22, skipping insertion in model container [2021-05-06 12:21:22,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:21:22" (1/1) ... [2021-05-06 12:21:22,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:21:22,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:21:22,996 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/cohencu-ll.c[596,609] [2021-05-06 12:21:23,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:21:23,020 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:21:23,030 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/cohencu-ll.c[596,609] [2021-05-06 12:21:23,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:21:23,087 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:21:23,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23 WrapperNode [2021-05-06 12:21:23,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:21:23,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:21:23,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:21:23,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:21:23,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (1/1) ... [2021-05-06 12:21:23,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:21:23,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:21:23,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:21:23,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:21:23,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (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 12:21:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:21:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:21:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:21:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:21:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:21:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:21:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:21:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:21:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:21:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:21:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 12:21:23,193 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:21:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:21:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:21:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:21:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:21:23,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:21:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:21:23,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:21:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:21:23,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:21:23,483 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:21:23,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:21:23 BoogieIcfgContainer [2021-05-06 12:21:23,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:21:23,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:21:23,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:21:23,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:21:23,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:21:22" (1/3) ... [2021-05-06 12:21:23,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd6e37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:21:23, skipping insertion in model container [2021-05-06 12:21:23,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:21:23" (2/3) ... [2021-05-06 12:21:23,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd6e37c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:21:23, skipping insertion in model container [2021-05-06 12:21:23,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:21:23" (3/3) ... [2021-05-06 12:21:23,505 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll.c [2021-05-06 12:21:23,510 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:21:23,515 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:21:23,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:21:23,547 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:21:23,547 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:21:23,547 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:21:23,547 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:21:23,548 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:21:23,548 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:21:23,548 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:21:23,548 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:21:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 12:21:23,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 12:21:23,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:23,564 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:23,565 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1298655804, now seen corresponding path program 1 times [2021-05-06 12:21:23,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:23,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942937619] [2021-05-06 12:21:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:23,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:23,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:23,737 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942937619] [2021-05-06 12:21:23,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [942937619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:23,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:23,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:21:23,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660671587] [2021-05-06 12:21:23,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:21:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:21:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:21:23,755 INFO L87 Difference]: Start difference. First operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:23,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:23,887 INFO L93 Difference]: Finished difference Result 54 states and 91 transitions. [2021-05-06 12:21:23,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:21:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 12:21:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:23,895 INFO L225 Difference]: With dead ends: 54 [2021-05-06 12:21:23,896 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 12:21:23,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:21:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 12:21:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 12:21:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 12:21:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2021-05-06 12:21:23,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 11 [2021-05-06 12:21:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:23,953 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2021-05-06 12:21:23,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2021-05-06 12:21:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 12:21:23,954 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:23,954 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:23,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:21:23,955 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1297106672, now seen corresponding path program 1 times [2021-05-06 12:21:23,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:23,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305725358] [2021-05-06 12:21:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:23,963 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:24,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:21:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:21:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 12:21:24,117 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:21:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305725358] [2021-05-06 12:21:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305725358] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:21:24,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:21:24,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 12:21:24,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58053425] [2021-05-06 12:21:24,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 12:21:24,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:21:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 12:21:24,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:21:24,120 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:21:24,459 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-05-06 12:21:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 12:21:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 12:21:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:21:24,460 INFO L225 Difference]: With dead ends: 31 [2021-05-06 12:21:24,460 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 12:21:24,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 12:21:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 12:21:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 12:21:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 12:21:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-05-06 12:21:24,474 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2021-05-06 12:21:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:21:24,474 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-05-06 12:21:24,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 12:21:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-05-06 12:21:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 12:21:24,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:21:24,475 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:21:24,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:21:24,476 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:21:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:21:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2099401665, now seen corresponding path program 1 times [2021-05-06 12:21:24,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:21:24,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975991193] [2021-05-06 12:21:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:21:24,478 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:21:24,488 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:21:24,489 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:21:24,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 12:21:24,502 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:21:24,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:21:24 BoogieIcfgContainer [2021-05-06 12:21:24,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:21:24,503 INFO L168 Benchmark]: Toolchain (without parser) took 1652.23 ms. Allocated memory is still 186.6 MB. Free memory was 152.0 MB in the beginning and 107.7 MB in the end (delta: 44.3 MB). Peak memory consumption was 45.3 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:24,504 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory was 168.8 MB in the beginning and 168.7 MB in the end (delta: 84.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:21:24,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.81 ms. Allocated memory is still 186.6 MB. Free memory was 151.8 MB in the beginning and 170.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:24,505 INFO L168 Benchmark]: Boogie Preprocessor took 33.63 ms. Allocated memory is still 186.6 MB. Free memory was 170.5 MB in the beginning and 168.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:24,505 INFO L168 Benchmark]: RCFGBuilder took 361.14 ms. Allocated memory is still 186.6 MB. Free memory was 168.7 MB in the beginning and 154.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:24,506 INFO L168 Benchmark]: TraceAbstraction took 1002.57 ms. Allocated memory is still 186.6 MB. Free memory was 153.4 MB in the beginning and 107.7 MB in the end (delta: 45.7 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:21:24,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory was 168.8 MB in the beginning and 168.7 MB in the end (delta: 84.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 231.81 ms. Allocated memory is still 186.6 MB. Free memory was 151.8 MB in the beginning and 170.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.63 ms. Allocated memory is still 186.6 MB. Free memory was 170.5 MB in the beginning and 168.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 361.14 ms. Allocated memory is still 186.6 MB. Free memory was 168.7 MB in the beginning and 154.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1002.57 ms. Allocated memory is still 186.6 MB. Free memory was 153.4 MB in the beginning and 107.7 MB in the end (delta: 45.7 MB). Peak memory consumption was 46.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: 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] short a; [L24] long long n, x, y, z; [L25] a = __VERIFIER_nondet_unsigned_short() [L27] n = 0 [L28] x = 0 [L29] y = 1 [L30] z = 6 [L32] COND TRUE 1 [L33] CALL __VERIFIER_assert(z == 6 * n + 6) [L15] COND FALSE !(!(cond)) [L33] RET __VERIFIER_assert(z == 6 * n + 6) [L34] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 947.5ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 9.1ms, AutomataDifference: 498.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 48 SDtfs, 29 SDslu, 39 SDs, 0 SdLazy, 83 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 224.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 196.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.3ms AutomataMinimizationTime, 2 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...