/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:23:19,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:23:19,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:23:19,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:23:19,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:23:19,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:23:19,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:23:19,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:23:19,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:23:19,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:23:19,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:23:19,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:23:19,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:23:19,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:23:19,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:23:19,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:23:19,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:23:19,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:23:19,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:23:19,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:23:19,396 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 12:23:19,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:23:19,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:23:19,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:23:19,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:23:19,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:23:19,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:23:19,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:23:19,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:23:19,407 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:23:19,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:23:19,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:23:19,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:23:19,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:23:19,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:23:19,658 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:23:19,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-06 12:23:19,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44f4f4c8/48953e101f304172a8666d53a6b35602/FLAGd0ed7c993 [2021-05-06 12:23:20,078 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:23:20,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound5.c [2021-05-06 12:23:20,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44f4f4c8/48953e101f304172a8666d53a6b35602/FLAGd0ed7c993 [2021-05-06 12:23:20,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44f4f4c8/48953e101f304172a8666d53a6b35602 [2021-05-06 12:23:20,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:23:20,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:23:20,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:23:20,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:23:20,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:23:20,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7320682e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20, skipping insertion in model container [2021-05-06 12:23:20,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:23:20,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:23:20,608 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/cohendiv-ll_valuebound5.c[576,589] [2021-05-06 12:23:20,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:23:20,627 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:23:20,634 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/cohendiv-ll_valuebound5.c[576,589] [2021-05-06 12:23:20,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:23:20,664 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:23:20,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20 WrapperNode [2021-05-06 12:23:20,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:23:20,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:23:20,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:23:20,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:23:20,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (1/1) ... [2021-05-06 12:23:20,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:23:20,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:23:20,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:23:20,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:23:20,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (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 12:23:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:23:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:23:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:23:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:23:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:23:20,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:23:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:23:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:23:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:23:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:23:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:23:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:23:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:23:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:23:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:23:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:23:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:23:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:23:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:23:20,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:23:21,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:23:21,042 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 12:23:21,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:23:21 BoogieIcfgContainer [2021-05-06 12:23:21,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:23:21,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:23:21,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:23:21,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:23:21,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:23:20" (1/3) ... [2021-05-06 12:23:21,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7c6196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:23:21, skipping insertion in model container [2021-05-06 12:23:21,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:23:20" (2/3) ... [2021-05-06 12:23:21,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7c6196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:23:21, skipping insertion in model container [2021-05-06 12:23:21,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:23:21" (3/3) ... [2021-05-06 12:23:21,048 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound5.c [2021-05-06 12:23:21,068 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:23:21,070 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:23:21,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:23:21,107 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:23:21,107 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:23:21,108 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:23:21,108 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:23:21,108 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:23:21,108 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:23:21,108 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:23:21,108 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:23:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 12:23:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 12:23:21,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:23:21,129 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:23:21,129 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:23:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:23:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2021-05-06 12:23:21,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:23:21,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294082429] [2021-05-06 12:23:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:23:21,184 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:23:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:23:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:23:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:21,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 12:23:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 12:23:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:23:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 12:23:21,401 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:23:21,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294082429] [2021-05-06 12:23:21,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [294082429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:23:21,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:23:21,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:23:21,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074553932] [2021-05-06 12:23:21,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:23:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:23:21,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:23:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:23:21,421 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 12:23:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:23:21,577 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2021-05-06 12:23:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:23:21,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 12:23:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:23:21,584 INFO L225 Difference]: With dead ends: 71 [2021-05-06 12:23:21,584 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 12:23:21,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:23:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 12:23:21,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 12:23:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 12:23:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 12:23:21,614 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-06 12:23:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:23:21,614 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 12:23:21,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 12:23:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 12:23:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 12:23:21,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:23:21,616 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:23:21,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:23:21,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:23:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:23:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2021-05-06 12:23:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:23:21,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731498221] [2021-05-06 12:23:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:23:21,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:23:21,630 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:23:21,630 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:23:21,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:23:21,644 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:23:21,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:23:21 BoogieIcfgContainer [2021-05-06 12:23:21,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:23:21,645 INFO L168 Benchmark]: Toolchain (without parser) took 1136.28 ms. Allocated memory is still 179.3 MB. Free memory was 144.9 MB in the beginning and 102.1 MB in the end (delta: 42.8 MB). Peak memory consumption was 44.3 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:21,646 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:23:21,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.65 ms. Allocated memory is still 179.3 MB. Free memory was 144.7 MB in the beginning and 134.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:21,646 INFO L168 Benchmark]: Boogie Preprocessor took 55.23 ms. Allocated memory is still 179.3 MB. Free memory was 134.9 MB in the beginning and 162.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:21,647 INFO L168 Benchmark]: RCFGBuilder took 322.43 ms. Allocated memory is still 179.3 MB. Free memory was 162.4 MB in the beginning and 146.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:21,647 INFO L168 Benchmark]: TraceAbstraction took 600.28 ms. Allocated memory is still 179.3 MB. Free memory was 145.6 MB in the beginning and 102.1 MB in the end (delta: 43.5 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-05-06 12:23:21,648 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 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 154.65 ms. Allocated memory is still 179.3 MB. Free memory was 144.7 MB in the beginning and 134.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.23 ms. Allocated memory is still 179.3 MB. Free memory was 134.9 MB in the beginning and 162.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.43 ms. Allocated memory is still 179.3 MB. Free memory was 162.4 MB in the beginning and 146.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 600.28 ms. Allocated memory is still 179.3 MB. Free memory was 145.6 MB in the beginning and 102.1 MB in the end (delta: 43.5 MB). Peak memory consumption was 44.0 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] int x, y; [L24] long long q, r, a, b; [L26] x = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(x>=0 && x<=5) [L12] COND FALSE !(!cond) [L27] RET assume_abort_if_not(x>=0 && x<=5) [L28] y = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(y>=0 && y<=5) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(y>=0 && y<=5) [L31] CALL assume_abort_if_not(y >= 1) [L12] COND FALSE !(!cond) [L31] RET assume_abort_if_not(y >= 1) [L33] q = 0 [L34] r = x [L35] a = 0 [L36] b = 0 [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(b == y*a) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 527.4ms, OverallIterations: 2, TraceHistogramMax: 3, EmptinessCheckTime: 12.8ms, AutomataDifference: 179.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 37 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 13 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 94.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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: 18.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...