/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:40:31,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:40:31,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:40:31,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 05:40:31,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 05:40:31,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 05:40:31,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 05:40:31,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 05:40:31,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 05:40:31,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 05:40:31,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 05:40:31,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 05:40:31,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:40:31,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:40:31,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:40:31,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:40:31,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:40:31,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:40:31,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:40:31,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:40:31,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:40:31,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:40:31,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:40:31,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:40:31,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:40:31,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:40:31,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:40:31,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:40:31,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:40:31,912 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:40:31,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:40:31,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:40:31,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:40:31,918 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:40:31,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:40:31,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:40:31,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:40:31,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:40:31,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:40:31,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:40:31,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:40:31,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:40:31,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:40:31,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:40:31,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:40:31,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:40:31,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:40:31,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:40:31,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:40:31,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:40:31,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:40:31,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:40:31,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:40:31,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:40:31,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:40:32,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:40:32,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:40:32,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:40:32,449 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:40:32,449 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:40:32,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c [2020-12-22 05:40:32,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667ff8c26/0047527b474f4a3fad5c4c2bf3c615e5/FLAGbf04f3e3f [2020-12-22 05:40:33,275 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:40:33,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c [2020-12-22 05:40:33,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667ff8c26/0047527b474f4a3fad5c4c2bf3c615e5/FLAGbf04f3e3f [2020-12-22 05:40:33,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/667ff8c26/0047527b474f4a3fad5c4c2bf3c615e5 [2020-12-22 05:40:33,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:40:33,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:40:33,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:33,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:40:33,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:40:33,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:33,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337429c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33, skipping insertion in model container [2020-12-22 05:40:33,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:33,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:40:33,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:40:33,882 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c[458,471] [2020-12-22 05:40:33,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:33,917 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:40:33,933 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound1.c[458,471] [2020-12-22 05:40:33,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:40:33,960 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:40:33,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33 WrapperNode [2020-12-22 05:40:33,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:40:33,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:33,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:40:33,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:40:33,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:33,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:40:34,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:40:34,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:40:34,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:40:34,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (1/1) ... [2020-12-22 05:40:34,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:40:34,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:40:34,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:40:34,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:40:34,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (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 [2020-12-22 05:40:34,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:40:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:40:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:40:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:40:34,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:40:34,672 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 05:40:34,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:34 BoogieIcfgContainer [2020-12-22 05:40:34,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:40:34,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:40:34,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:40:34,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:40:34,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:40:33" (1/3) ... [2020-12-22 05:40:34,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5413e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:34, skipping insertion in model container [2020-12-22 05:40:34,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:40:33" (2/3) ... [2020-12-22 05:40:34,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5413e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:40:34, skipping insertion in model container [2020-12-22 05:40:34,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:34" (3/3) ... [2020-12-22 05:40:34,728 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound1.c [2020-12-22 05:40:34,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:40:34,757 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:40:34,781 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:40:34,814 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:40:34,814 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:40:34,815 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:40:34,818 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:40:34,818 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:40:34,819 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:40:34,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:40:34,819 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:40:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 05:40:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 05:40:34,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:34,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 05:40:34,858 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:34,867 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-22 05:40:34,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:34,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894394618] [2020-12-22 05:40:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:35,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:35,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753755962] [2020-12-22 05:40:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 05:40:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:35,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894394618] [2020-12-22 05:40:35,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:35,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753755962] [2020-12-22 05:40:35,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:40:35,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 05:40:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390037598] [2020-12-22 05:40:35,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:40:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:40:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:40:35,315 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 4 states. [2020-12-22 05:40:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:35,403 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-22 05:40:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:40:35,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 05:40:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:35,416 INFO L225 Difference]: With dead ends: 54 [2020-12-22 05:40:35,417 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:40:35,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:35,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:40:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-22 05:40:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:40:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 05:40:35,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2020-12-22 05:40:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:35,460 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 05:40:35,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:40:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 05:40:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:40:35,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:35,461 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:35,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 05:40:35,677 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-22 05:40:35,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:35,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048865697] [2020-12-22 05:40:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:35,696 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:35,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406360960] [2020-12-22 05:40:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:40:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:35,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048865697] [2020-12-22 05:40:35,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:35,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406360960] [2020-12-22 05:40:35,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:35,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:40:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217430926] [2020-12-22 05:40:35,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:40:35,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:35,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:40:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:40:35,847 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-12-22 05:40:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:35,873 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-22 05:40:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 05:40:35,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 05:40:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:35,875 INFO L225 Difference]: With dead ends: 30 [2020-12-22 05:40:35,875 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 05:40:35,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:40:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 05:40:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 05:40:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 05:40:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2020-12-22 05:40:35,881 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 10 [2020-12-22 05:40:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:35,882 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2020-12-22 05:40:35,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:40:35,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2020-12-22 05:40:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:40:35,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:35,883 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:36,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:36,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:36,097 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2020-12-22 05:40:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:36,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266779076] [2020-12-22 05:40:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:36,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:36,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238031718] [2020-12-22 05:40:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:40:36,165 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:40:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 05:40:36,181 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 05:40:36,216 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 05:40:36,216 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 05:40:36,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:36,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 05:40:36 BoogieIcfgContainer [2020-12-22 05:40:36,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 05:40:36,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 05:40:36,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 05:40:36,457 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 05:40:36,457 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:40:34" (3/4) ... [2020-12-22 05:40:36,462 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 05:40:36,575 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/nla-digbench-scaling/ps4-ll_unwindbound1.c-witness.graphml [2020-12-22 05:40:36,575 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 05:40:36,579 INFO L168 Benchmark]: Toolchain (without parser) took 2901.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 73.2 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,580 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 05:40:36,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,583 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.09 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,585 INFO L168 Benchmark]: Boogie Preprocessor took 29.64 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,588 INFO L168 Benchmark]: RCFGBuilder took 643.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 133.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,589 INFO L168 Benchmark]: TraceAbstraction took 1767.96 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 75.3 MB in the end (delta: 58.2 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,590 INFO L168 Benchmark]: Witness Printer took 119.28 ms. Allocated memory is still 151.0 MB. Free memory was 75.3 MB in the beginning and 73.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 05:40:36,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.41 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 116.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.09 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.64 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 643.37 ms. Allocated memory is still 151.0 MB. Free memory was 114.2 MB in the beginning and 133.8 MB in the end (delta: -19.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1767.96 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 75.3 MB in the end (delta: 58.2 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. * Witness Printer took 119.28 ms. Allocated memory is still 151.0 MB. Free memory was 75.3 MB in the beginning and 73.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<1 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND FALSE !(counter++<1) [L10] COND TRUE !(cond) VAL [counter=2] [L12] reach_error() VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 36 SDslu, 39 SDs, 0 SdLazy, 29 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 302 SizeOfPredicates, 4 NumberOfNonLiveVariables, 127 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, 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 proved your program to be incorrect! Received shutdown request...