/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/prodbin-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:39:44,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:39:44,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:39:44,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:39:44,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:39:44,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:39:44,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:39:44,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:39:44,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:39:44,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:39:44,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:39:44,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:39:44,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:39:44,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:39:44,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:39:44,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:39:44,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:39:44,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:39:44,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:39:44,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:39:44,464 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 00:39:44,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:39:44,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:39:44,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:39:44,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:39:44,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:39:44,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:39:44,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:39:44,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:39:44,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:39:44,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:39:44,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:39:44,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:39:44,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:39:44,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:39:44,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:39:44,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:39:44,483 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:39:44,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:39:44,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:39:44,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:39:44,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:39:44,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:39:44,842 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:39:44,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2021-05-03 00:39:44,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c34242c7b/1801c2abf37247328ee97d5b19def6fc/FLAG0cb14ba88 [2021-05-03 00:39:45,309 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:39:45,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2021-05-03 00:39:45,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c34242c7b/1801c2abf37247328ee97d5b19def6fc/FLAG0cb14ba88 [2021-05-03 00:39:45,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c34242c7b/1801c2abf37247328ee97d5b19def6fc [2021-05-03 00:39:45,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:39:45,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:39:45,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:45,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:39:45,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:39:45,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d376049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45, skipping insertion in model container [2021-05-03 00:39:45,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:39:45,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:39:45,515 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/prodbin-ll.c[537,550] [2021-05-03 00:39:45,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:45,537 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:39:45,569 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/prodbin-ll.c[537,550] [2021-05-03 00:39:45,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:45,616 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:39:45,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45 WrapperNode [2021-05-03 00:39:45,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:45,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:39:45,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:39:45,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:39:45,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (1/1) ... [2021-05-03 00:39:45,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:39:45,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:39:45,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:39:45,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:39:45,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (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 00:39:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:39:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:39:45,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:39:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:39:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:39:45,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:39:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:39:45,743 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:39:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:39:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:39:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:39:45,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:39:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:39:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:39:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:39:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:39:45,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:39:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:39:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:39:45,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:39:46,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:39:46,037 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:39:46,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:46 BoogieIcfgContainer [2021-05-03 00:39:46,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:39:46,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:39:46,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:39:46,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:39:46,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:39:45" (1/3) ... [2021-05-03 00:39:46,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63473ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:46, skipping insertion in model container [2021-05-03 00:39:46,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:45" (2/3) ... [2021-05-03 00:39:46,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63473ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:46, skipping insertion in model container [2021-05-03 00:39:46,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:46" (3/3) ... [2021-05-03 00:39:46,046 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2021-05-03 00:39:46,050 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:39:46,060 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:39:46,075 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:39:46,105 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:39:46,105 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:39:46,106 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:39:46,106 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:39:46,106 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:39:46,106 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:39:46,106 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:39:46,106 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:39:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-03 00:39:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:39:46,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:46,134 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:46,135 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2112761405, now seen corresponding path program 1 times [2021-05-03 00:39:46,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:46,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229193082] [2021-05-03 00:39:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:46,211 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:46,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:39:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:46,395 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:46,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229193082] [2021-05-03 00:39:46,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1229193082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:46,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:46,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:39:46,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242987273] [2021-05-03 00:39:46,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:39:46,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:39:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:46,414 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:39:46,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:46,497 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-03 00:39:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:39:46,499 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-03 00:39:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:46,505 INFO L225 Difference]: With dead ends: 49 [2021-05-03 00:39:46,505 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 00:39:46,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 00:39:46,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 00:39:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:39:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-03 00:39:46,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-05-03 00:39:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:46,565 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-03 00:39:46,565 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-03 00:39:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-03 00:39:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 00:39:46,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:46,566 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:46,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:39:46,569 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1500360061, now seen corresponding path program 1 times [2021-05-03 00:39:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:46,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324178015] [2021-05-03 00:39:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:46,577 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:46,601 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:39:46,602 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:39:46,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:39:46,624 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:39:46,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:39:46 BoogieIcfgContainer [2021-05-03 00:39:46,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:39:46,627 INFO L168 Benchmark]: Toolchain (without parser) took 1287.25 ms. Allocated memory is still 208.7 MB. Free memory was 173.0 MB in the beginning and 140.7 MB in the end (delta: 32.3 MB). Peak memory consumption was 31.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:46,628 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 208.7 MB. Free memory is still 189.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:39:46,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.25 ms. Allocated memory is still 208.7 MB. Free memory was 172.9 MB in the beginning and 191.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:46,630 INFO L168 Benchmark]: Boogie Preprocessor took 41.56 ms. Allocated memory is still 208.7 MB. Free memory was 191.0 MB in the beginning and 189.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:46,631 INFO L168 Benchmark]: RCFGBuilder took 378.32 ms. Allocated memory is still 208.7 MB. Free memory was 189.5 MB in the beginning and 174.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:46,631 INFO L168 Benchmark]: TraceAbstraction took 585.03 ms. Allocated memory is still 208.7 MB. Free memory was 174.3 MB in the beginning and 140.7 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:46,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 208.7 MB. Free memory is still 189.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 274.25 ms. Allocated memory is still 208.7 MB. Free memory was 172.9 MB in the beginning and 191.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.56 ms. Allocated memory is still 208.7 MB. Free memory was 191.0 MB in the beginning and 189.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 378.32 ms. Allocated memory is still 208.7 MB. Free memory was 189.5 MB in the beginning and 174.3 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 585.03 ms. Allocated memory is still 208.7 MB. Free memory was 174.3 MB in the beginning and 140.7 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int a, b; [L22] long long x, y, z; [L24] a = __VERIFIER_nondet_int() [L25] b = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) [L26] RET assume_abort_if_not(b >= 1) [L28] x = a [L29] y = b [L30] z = 0 [L32] COND TRUE 1 [L33] CALL __VERIFIER_assert(z + x * y == (long long) a * b) [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 507.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.3ms, AutomataDifference: 106.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: 36.9ms 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...