/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/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:43:04,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:43:04,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:43:04,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:43:04,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:43:04,789 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:43:04,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:43:04,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:43:04,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:43:04,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:43:04,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:43:04,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:43:04,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:43:04,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:43:04,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:43:04,796 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:43:04,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:43:04,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:43:04,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:43:04,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:43:04,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:43:04,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:43:04,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:43:04,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:43:04,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:43:04,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:43:04,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:43:04,798 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:43:04,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:43:05,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:43:05,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:43:05,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:43:05,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:43:05,222 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:43:05,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-03 00:43:05,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9bc3d25/ddda1a5a3bbd4cea9fd59095264b224b/FLAG50d048c2c [2021-05-03 00:43:05,941 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:43:05,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-05-03 00:43:05,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9bc3d25/ddda1a5a3bbd4cea9fd59095264b224b/FLAG50d048c2c [2021-05-03 00:43:05,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd9bc3d25/ddda1a5a3bbd4cea9fd59095264b224b [2021-05-03 00:43:05,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:43:05,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:43:05,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:43:05,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:43:05,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:43:05,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:43:05" (1/1) ... [2021-05-03 00:43:05,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa223cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:05, skipping insertion in model container [2021-05-03 00:43:05,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:43:05" (1/1) ... [2021-05-03 00:43:06,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:43:06,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:43:06,204 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/egcd3-ll_unwindbound10.c[490,503] [2021-05-03 00:43:06,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:43:06,247 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:43:06,296 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/egcd3-ll_unwindbound10.c[490,503] [2021-05-03 00:43:06,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:43:06,324 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:43:06,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06 WrapperNode [2021-05-03 00:43:06,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:43:06,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:43:06,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:43:06,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:43:06,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... [2021-05-03 00:43:06,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:43:06,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:43:06,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:43:06,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:43:06,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:43:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:43:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:43:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:43:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:43:06,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:43:06,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:43:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:43:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:43:06,450 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:43:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:43:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:43:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:43:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:43:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:43:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:43:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:43:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:43:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:43:06,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:43:06,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:43:06,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:43:06,762 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 00:43:06,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:43:06 BoogieIcfgContainer [2021-05-03 00:43:06,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:43:06,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:43:06,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:43:06,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:43:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:43:05" (1/3) ... [2021-05-03 00:43:06,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7779b991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:43:06, skipping insertion in model container [2021-05-03 00:43:06,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:43:06" (2/3) ... [2021-05-03 00:43:06,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7779b991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:43:06, skipping insertion in model container [2021-05-03 00:43:06,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:43:06" (3/3) ... [2021-05-03 00:43:06,771 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2021-05-03 00:43:06,776 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:43:06,796 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:43:06,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:43:06,863 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:43:06,864 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:43:06,864 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:43:06,864 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:43:06,864 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:43:06,864 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:43:06,864 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:43:06,864 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:43:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-03 00:43:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 00:43:06,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:06,897 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:06,897 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:06,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-03 00:43:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523427770] [2021-05-03 00:43:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:06,976 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:43:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:43:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:43:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:07,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-03 00:43:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:43:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 00:43:07,278 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:43:07,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523427770] [2021-05-03 00:43:07,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1523427770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:43:07,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:43:07,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:43:07,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395638910] [2021-05-03 00:43:07,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:43:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:43:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:43:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:43:07,306 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:43:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:43:07,562 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-03 00:43:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:43:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-03 00:43:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:43:07,578 INFO L225 Difference]: With dead ends: 74 [2021-05-03 00:43:07,579 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 00:43:07,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:43:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 00:43:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-03 00:43:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-03 00:43:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-03 00:43:07,652 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-03 00:43:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:43:07,653 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-03 00:43:07,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-03 00:43:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-03 00:43:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 00:43:07,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:43:07,655 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:43:07,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:43:07,656 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:43:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:43:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-03 00:43:07,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:43:07,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65025868] [2021-05-03 00:43:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:43:07,671 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:43:07,705 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:43:07,706 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:43:07,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:43:07,735 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:43:07,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:43:07 BoogieIcfgContainer [2021-05-03 00:43:07,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:43:07,742 INFO L168 Benchmark]: Toolchain (without parser) took 1753.36 ms. Allocated memory is still 185.6 MB. Free memory was 151.4 MB in the beginning and 157.7 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:07,742 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 185.6 MB. Free memory is still 168.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:07,743 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.05 ms. Allocated memory is still 185.6 MB. Free memory was 151.2 MB in the beginning and 169.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:07,744 INFO L168 Benchmark]: Boogie Preprocessor took 58.30 ms. Allocated memory is still 185.6 MB. Free memory was 169.0 MB in the beginning and 167.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:07,745 INFO L168 Benchmark]: RCFGBuilder took 377.17 ms. Allocated memory is still 185.6 MB. Free memory was 167.4 MB in the beginning and 149.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:43:07,746 INFO L168 Benchmark]: TraceAbstraction took 972.90 ms. Allocated memory is still 185.6 MB. Free memory was 149.2 MB in the beginning and 157.7 MB in the end (delta: -8.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:43:07,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 185.6 MB. Free memory is still 168.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 335.05 ms. Allocated memory is still 185.6 MB. Free memory was 151.2 MB in the beginning and 169.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.30 ms. Allocated memory is still 185.6 MB. Free memory was 169.0 MB in the beginning and 167.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 377.17 ms. Allocated memory is still 185.6 MB. Free memory was 167.4 MB in the beginning and 149.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 972.90 ms. Allocated memory is still 185.6 MB. Free memory was 149.2 MB in the beginning and 157.7 MB in the end (delta: -8.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L34] EXPR counter++ [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 855.6ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 11.5ms, AutomataDifference: 293.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 10 SDslu, 4 SDs, 0 SdLazy, 29 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 53.1ms 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...