/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:19:48,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:19:48,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:19:48,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:19:48,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:19:48,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:19:48,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:19:48,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:19:48,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:19:48,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:19:48,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:19:48,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:19:48,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:19:48,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:19:48,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:19:48,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:19:48,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:19:48,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:19:48,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:19:48,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:19:48,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:19:48,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:19:48,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:19:48,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:19:48,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:19:48,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:19:48,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:19:48,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:19:48,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:19:48,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:19:48,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:19:48,897 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:19:48,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:19:48,897 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:19:48,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:19:48,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:19:48,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:19:48,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:19:48,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:19:48,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:19:48,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:19:48,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:19:48,899 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:19:48,899 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:19:48,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:19:49,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:19:49,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:19:49,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:19:49,278 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:19:49,279 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:19:49,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-05-01 08:19:49,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ec7188d/f99033b592244498835beba04b4b9ae5/FLAGac8d88905 [2021-05-01 08:19:49,965 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:19:49,965 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2021-05-01 08:19:49,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ec7188d/f99033b592244498835beba04b4b9ae5/FLAGac8d88905 [2021-05-01 08:19:50,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ec7188d/f99033b592244498835beba04b4b9ae5 [2021-05-01 08:19:50,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:19:50,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:19:50,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:50,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:19:50,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:19:50,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4e6c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50, skipping insertion in model container [2021-05-01 08:19:50,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:19:50,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:19:50,477 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/bresenham-ll_unwindbound5.c[597,610] [2021-05-01 08:19:50,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:50,501 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:19:50,529 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/bresenham-ll_unwindbound5.c[597,610] [2021-05-01 08:19:50,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:19:50,583 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:19:50,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50 WrapperNode [2021-05-01 08:19:50,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:19:50,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:19:50,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:19:50,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:19:50,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (1/1) ... [2021-05-01 08:19:50,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:19:50,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:19:50,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:19:50,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:19:50,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (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 [2021-05-01 08:19:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:19:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:19:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:19:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:19:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:19:50,717 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:19:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:19:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:19:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:19:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:19:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:19:50,718 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:19:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:19:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:19:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:19:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:19:50,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:19:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:19:50,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:19:50,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:19:51,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:19:51,061 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 08:19:51,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:51 BoogieIcfgContainer [2021-05-01 08:19:51,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:19:51,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:19:51,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:19:51,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:19:51,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:19:50" (1/3) ... [2021-05-01 08:19:51,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18db8e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:51, skipping insertion in model container [2021-05-01 08:19:51,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:19:50" (2/3) ... [2021-05-01 08:19:51,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18db8e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:19:51, skipping insertion in model container [2021-05-01 08:19:51,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:19:51" (3/3) ... [2021-05-01 08:19:51,087 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2021-05-01 08:19:51,093 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:19:51,114 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:19:51,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:19:51,173 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:19:51,174 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:19:51,174 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:19:51,174 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:19:51,174 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:19:51,174 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:19:51,174 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:19:51,174 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:19:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-01 08:19:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:19:51,212 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:51,212 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:51,213 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2021-05-01 08:19:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:51,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298092085] [2021-05-01 08:19:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:51,299 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:51,449 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:51,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:51,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:51,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:51,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:19:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:19:51,580 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:19:51,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:19:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 08:19:51,586 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:19:51,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298092085] [2021-05-01 08:19:51,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [298092085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:19:51,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:19:51,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:19:51,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708310792] [2021-05-01 08:19:51,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:19:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:19:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:19:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:51,609 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-01 08:19:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:19:51,714 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-05-01 08:19:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:19:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-01 08:19:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:19:51,724 INFO L225 Difference]: With dead ends: 45 [2021-05-01 08:19:51,724 INFO L226 Difference]: Without dead ends: 21 [2021-05-01 08:19:51,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:19:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-01 08:19:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-01 08:19:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 08:19:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-01 08:19:51,758 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-01 08:19:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:19:51,759 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-01 08:19:51,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-05-01 08:19:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-01 08:19:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 08:19:51,759 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:19:51,760 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:19:51,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:19:51,760 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:19:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:19:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2021-05-01 08:19:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:19:51,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705751897] [2021-05-01 08:19:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:19:51,763 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:19:51,776 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:19:51,777 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:19:51,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:19:51,793 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:19:51,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:19:51 BoogieIcfgContainer [2021-05-01 08:19:51,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:19:51,795 INFO L168 Benchmark]: Toolchain (without parser) took 1464.47 ms. Allocated memory is still 188.7 MB. Free memory was 154.0 MB in the beginning and 121.8 MB in the end (delta: 32.1 MB). Peak memory consumption was 31.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:51,795 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 188.7 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:19:51,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.09 ms. Allocated memory is still 188.7 MB. Free memory was 153.8 MB in the beginning and 172.2 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:51,796 INFO L168 Benchmark]: Boogie Preprocessor took 50.32 ms. Allocated memory is still 188.7 MB. Free memory was 172.2 MB in the beginning and 170.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:51,797 INFO L168 Benchmark]: RCFGBuilder took 423.98 ms. Allocated memory is still 188.7 MB. Free memory was 170.8 MB in the beginning and 155.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:51,797 INFO L168 Benchmark]: TraceAbstraction took 713.41 ms. Allocated memory is still 188.7 MB. Free memory was 155.0 MB in the beginning and 121.8 MB in the end (delta: 33.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:19:51,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 188.7 MB. Free memory is still 170.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 253.09 ms. Allocated memory is still 188.7 MB. Free memory was 153.8 MB in the beginning and 172.2 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.32 ms. Allocated memory is still 188.7 MB. Free memory was 172.2 MB in the beginning and 170.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 423.98 ms. Allocated memory is still 188.7 MB. Free memory was 170.8 MB in the beginning and 155.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 713.41 ms. Allocated memory is still 188.7 MB. Free memory was 155.0 MB in the beginning and 121.8 MB in the end (delta: 33.2 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 16]: 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: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 [L31] EXPR counter++ [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) [L14] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 610.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 23.0ms, AutomataDifference: 130.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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: 18.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...