/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/egcd-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 12:27:34,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 12:27:34,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 12:27:34,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 12:27:34,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 12:27:34,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 12:27:34,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 12:27:34,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 12:27:34,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 12:27:34,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 12:27:34,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 12:27:34,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 12:27:34,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 12:27:34,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 12:27:34,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 12:27:34,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 12:27:34,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 12:27:34,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 12:27:34,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 12:27:34,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 12:27:34,626 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 12:27:34,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 12:27:34,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 12:27:34,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 12:27:34,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 12:27:34,640 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 12:27:34,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 12:27:34,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 12:27:34,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 12:27:34,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 12:27:34,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 12:27:34,642 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 12:27:34,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 12:27:34,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 12:27:34,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 12:27:34,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 12:27:34,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 12:27:34,992 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 12:27:34,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-06 12:27:35,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7560d3c3/564a179584a84866a2a4ecf466ebcecb/FLAGf04d4996c [2021-05-06 12:27:35,425 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 12:27:35,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound100.c [2021-05-06 12:27:35,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7560d3c3/564a179584a84866a2a4ecf466ebcecb/FLAGf04d4996c [2021-05-06 12:27:35,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7560d3c3/564a179584a84866a2a4ecf466ebcecb [2021-05-06 12:27:35,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 12:27:35,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 12:27:35,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 12:27:35,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 12:27:35,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 12:27:35,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb02b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35, skipping insertion in model container [2021-05-06 12:27:35,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 12:27:35,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 12:27:35,585 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/egcd-ll_unwindbound100.c[489,502] [2021-05-06 12:27:35,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:27:35,663 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 12:27:35,676 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/egcd-ll_unwindbound100.c[489,502] [2021-05-06 12:27:35,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 12:27:35,700 INFO L208 MainTranslator]: Completed translation [2021-05-06 12:27:35,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35 WrapperNode [2021-05-06 12:27:35,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 12:27:35,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 12:27:35,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 12:27:35,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 12:27:35,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (1/1) ... [2021-05-06 12:27:35,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 12:27:35,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 12:27:35,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 12:27:35,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 12:27:35,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (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 12:27:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 12:27:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 12:27:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 12:27:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 12:27:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 12:27:35,798 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 12:27:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 12:27:35,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 12:27:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 12:27:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 12:27:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 12:27:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 12:27:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 12:27:35,799 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 12:27:35,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 12:27:35,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 12:27:35,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 12:27:35,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 12:27:35,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 12:27:35,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 12:27:36,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 12:27:36,035 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 12:27:36,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:27:36 BoogieIcfgContainer [2021-05-06 12:27:36,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 12:27:36,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 12:27:36,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 12:27:36,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 12:27:36,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:27:35" (1/3) ... [2021-05-06 12:27:36,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be444b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:27:36, skipping insertion in model container [2021-05-06 12:27:36,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:27:35" (2/3) ... [2021-05-06 12:27:36,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be444b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:27:36, skipping insertion in model container [2021-05-06 12:27:36,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:27:36" (3/3) ... [2021-05-06 12:27:36,040 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound100.c [2021-05-06 12:27:36,059 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 12:27:36,061 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 12:27:36,087 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 12:27:36,100 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 12:27:36,100 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 12:27:36,100 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 12:27:36,100 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 12:27:36,100 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 12:27:36,100 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 12:27:36,100 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 12:27:36,100 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 12:27:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 12:27:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 12:27:36,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:27:36,146 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 12:27:36,146 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:27:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:27:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 12:27:36,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:27:36,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381958400] [2021-05-06 12:27:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:27:36,226 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:27:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:27:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:27:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:27:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:27:36,424 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:27:36,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381958400] [2021-05-06 12:27:36,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381958400] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:27:36,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:27:36,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 12:27:36,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96306677] [2021-05-06 12:27:36,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 12:27:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:27:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 12:27:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:27:36,440 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2021-05-06 12:27:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:27:36,575 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 12:27:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 12:27:36,577 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 [2021-05-06 12:27:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:27:36,582 INFO L225 Difference]: With dead ends: 64 [2021-05-06 12:27:36,582 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 12:27:36,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 12:27:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 12:27:36,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 12:27:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 12:27:36,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 12:27:36,627 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 12:27:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:27:36,628 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 12:27:36,628 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) [2021-05-06 12:27:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 12:27:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:27:36,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:27:36,629 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] [2021-05-06 12:27:36,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 12:27:36,629 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:27:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:27:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 12:27:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:27:36,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735581357] [2021-05-06 12:27:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:27:36,632 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:27:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 12:27:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 12:27:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 12:27:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 12:27:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 12:27:36,797 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 12:27:36,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735581357] [2021-05-06 12:27:36,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735581357] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 12:27:36,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 12:27:36,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 12:27:36,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897346252] [2021-05-06 12:27:36,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 12:27:36,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 12:27:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 12:27:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 12:27:36,801 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 12:27:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 12:27:36,983 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 12:27:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 12:27:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 12:27:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 12:27:36,985 INFO L225 Difference]: With dead ends: 42 [2021-05-06 12:27:36,985 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 12:27:36,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 12:27:36,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 12:27:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 12:27:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 12:27:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 12:27:36,994 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 12:27:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 12:27:36,995 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 12:27:36,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 12:27:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 12:27:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 12:27:36,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 12:27:36,996 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] [2021-05-06 12:27:36,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 12:27:36,996 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 12:27:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 12:27:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 12:27:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 12:27:36,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538741848] [2021-05-06 12:27:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 12:27:36,998 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 12:27:37,022 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 12:27:37,023 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 12:27:37,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 12:27:37,040 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 12:27:37,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 12:27:37 BoogieIcfgContainer [2021-05-06 12:27:37,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 12:27:37,041 INFO L168 Benchmark]: Toolchain (without parser) took 1594.78 ms. Allocated memory is still 206.6 MB. Free memory was 171.0 MB in the beginning and 90.4 MB in the end (delta: 80.6 MB). Peak memory consumption was 81.4 MB. Max. memory is 8.0 GB. [2021-05-06 12:27:37,041 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 206.6 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 12:27:37,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.98 ms. Allocated memory is still 206.6 MB. Free memory was 170.8 MB in the beginning and 188.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. [2021-05-06 12:27:37,043 INFO L168 Benchmark]: Boogie Preprocessor took 34.42 ms. Allocated memory is still 206.6 MB. Free memory was 188.5 MB in the beginning and 186.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 12:27:37,047 INFO L168 Benchmark]: RCFGBuilder took 297.07 ms. Allocated memory is still 206.6 MB. Free memory was 186.9 MB in the beginning and 171.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:27:37,047 INFO L168 Benchmark]: TraceAbstraction took 1003.66 ms. Allocated memory is still 206.6 MB. Free memory was 170.6 MB in the beginning and 90.4 MB in the end (delta: 80.2 MB). Peak memory consumption was 80.7 MB. Max. memory is 8.0 GB. [2021-05-06 12:27:37,053 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 206.6 MB. Free memory is still 187.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.98 ms. Allocated memory is still 206.6 MB. Free memory was 170.8 MB in the beginning and 188.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.42 ms. Allocated memory is still 206.6 MB. Free memory was 188.5 MB in the beginning and 186.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 297.07 ms. Allocated memory is still 206.6 MB. Free memory was 186.9 MB in the beginning and 171.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1003.66 ms. Allocated memory is still 206.6 MB. Free memory was 170.6 MB in the beginning and 90.4 MB in the end (delta: 80.2 MB). Peak memory consumption was 80.7 MB. 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] long long a, b, p, q, r, s; [L21] int x, y; [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 TRUE counter++<100 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 927.5ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 22.6ms, AutomataDifference: 339.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 74 SDtfs, 23 SDslu, 41 SDs, 0 SdLazy, 70 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 175.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.0ms AutomataMinimizationTime, 2 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...