/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/loop-acceleration/diamond_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:24:27,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:24:27,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:24:27,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:24:27,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:24:27,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:24:27,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:24:27,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:24:27,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:24:27,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:24:27,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:24:27,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:24:27,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:24:27,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:24:27,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:24:27,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:24:27,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:24:27,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:24:27,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:24:27,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:24:27,399 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 11:24:27,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:24:27,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:24:27,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:24:27,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:24:27,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:24:27,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:24:27,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:24:27,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:24:27,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:24:27,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:24:27,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:24:27,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:24:27,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:24:27,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:24:27,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:24:27,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:24:27,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:24:27,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:24:27,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:24:27,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:24:27,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:24:27,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:24:27,417 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:24:27,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:24:27,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:24:27,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:24:27,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:24:27,692 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:24:27,692 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:24:27,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2021-05-06 11:24:27,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce4b2116/5b1e1eb4bf6040fb9f6b078077ad3ea0/FLAGd88d75afd [2021-05-06 11:24:28,041 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:24:28,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c [2021-05-06 11:24:28,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce4b2116/5b1e1eb4bf6040fb9f6b078077ad3ea0/FLAGd88d75afd [2021-05-06 11:24:28,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce4b2116/5b1e1eb4bf6040fb9f6b078077ad3ea0 [2021-05-06 11:24:28,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:24:28,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:24:28,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:24:28,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:24:28,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:24:28,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee82d6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28, skipping insertion in model container [2021-05-06 11:24:28,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:24:28,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:24:28,621 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c[373,386] [2021-05-06 11:24:28,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:24:28,646 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:24:28,653 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-1.c[373,386] [2021-05-06 11:24:28,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:24:28,669 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:24:28,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28 WrapperNode [2021-05-06 11:24:28,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:24:28,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:24:28,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:24:28,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:24:28,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (1/1) ... [2021-05-06 11:24:28,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:24:28,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:24:28,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:24:28,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:24:28,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (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 11:24:28,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:24:28,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:24:28,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:24:28,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:24:28,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:24:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:24:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:24:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:24:28,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:24:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 11:24:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:24:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:24:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:24:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:24:28,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:24:28,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:24:28,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:24:28,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:24:28,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:24:28,983 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:24:28,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:24:28 BoogieIcfgContainer [2021-05-06 11:24:28,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:24:28,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:24:28,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:24:28,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:24:28,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:24:28" (1/3) ... [2021-05-06 11:24:28,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f698c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:24:28, skipping insertion in model container [2021-05-06 11:24:28,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:28" (2/3) ... [2021-05-06 11:24:28,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f698c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:24:28, skipping insertion in model container [2021-05-06 11:24:28,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:24:28" (3/3) ... [2021-05-06 11:24:28,989 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-1.c [2021-05-06 11:24:28,993 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:24:28,995 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:24:29,005 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:24:29,018 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:24:29,018 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:24:29,018 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:24:29,018 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:24:29,018 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:24:29,018 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:24:29,018 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:24:29,018 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:24:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:24:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:24:29,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:29,031 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:29,032 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1418018830, now seen corresponding path program 1 times [2021-05-06 11:24:29,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:29,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556879647] [2021-05-06 11:24:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:29,085 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:29,257 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:29,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556879647] [2021-05-06 11:24:29,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1556879647] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:29,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:29,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:24:29,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522886766] [2021-05-06 11:24:29,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:24:29,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:24:29,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:24:29,278 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:29,341 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 11:24:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:24:29,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:24:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:29,347 INFO L225 Difference]: With dead ends: 30 [2021-05-06 11:24:29,347 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 11:24:29,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:24:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 11:24:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 11:24:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-06 11:24:29,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-06 11:24:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:29,384 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-06 11:24:29,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-06 11:24:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:24:29,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:29,386 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:29,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:24:29,387 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1427254040, now seen corresponding path program 1 times [2021-05-06 11:24:29,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:29,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308962601] [2021-05-06 11:24:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:29,392 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:29,531 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:29,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308962601] [2021-05-06 11:24:29,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308962601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:29,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:29,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:24:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140818633] [2021-05-06 11:24:29,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:24:29,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:24:29,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:24:29,537 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:29,614 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-05-06 11:24:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:24:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:24:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:29,616 INFO L225 Difference]: With dead ends: 20 [2021-05-06 11:24:29,616 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 11:24:29,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:24:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 11:24:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-06 11:24:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-06 11:24:29,621 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-06 11:24:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:29,621 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-06 11:24:29,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-06 11:24:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 11:24:29,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:29,622 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:29,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:24:29,622 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash -397340509, now seen corresponding path program 1 times [2021-05-06 11:24:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:29,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676699060] [2021-05-06 11:24:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:29,684 WARN L240 tifierPushTermWalker]: treesize reduction 13, result has 82.2 percent of original size [2021-05-06 11:24:29,687 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:29,718 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-06 11:24:29,739 WARN L245 tifierPushTermWalker]: treesize reduction 13, result has 82.2 percent of original size 60 [2021-05-06 11:24:29,759 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:24:29,762 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:29,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:30,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:30,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676699060] [2021-05-06 11:24:30,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676699060] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:30,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:30,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:24:30,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159740342] [2021-05-06 11:24:30,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:24:30,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:24:30,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:24:30,071 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:30,397 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-06 11:24:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 11:24:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 11:24:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:30,398 INFO L225 Difference]: With dead ends: 27 [2021-05-06 11:24:30,398 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 11:24:30,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-06 11:24:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 11:24:30,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 11:24:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 11:24:30,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-05-06 11:24:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:30,402 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 11:24:30,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 11:24:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 11:24:30,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:30,403 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:30,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:24:30,403 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash -454598811, now seen corresponding path program 1 times [2021-05-06 11:24:30,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:30,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786154275] [2021-05-06 11:24:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:30,411 WARN L240 tifierPushTermWalker]: treesize reduction 12, result has 83.6 percent of original size [2021-05-06 11:24:30,420 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:30,455 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-06 11:24:30,471 WARN L245 tifierPushTermWalker]: treesize reduction 12, result has 83.6 percent of original size 61 [2021-05-06 11:24:30,503 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:24:30,505 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:30,702 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:30,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786154275] [2021-05-06 11:24:30,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786154275] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:30,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:30,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 11:24:30,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413826134] [2021-05-06 11:24:30,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 11:24:30,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:30,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 11:24:30,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:24:30,704 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:30,950 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-06 11:24:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:24:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 11:24:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:30,951 INFO L225 Difference]: With dead ends: 20 [2021-05-06 11:24:30,951 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:24:30,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-06 11:24:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:24:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:24:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 11:24:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:24:30,952 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-05-06 11:24:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:30,952 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:24:30,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:24:30,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:24:30,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:24:30,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:24:31,218 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-05-06 11:24:31,337 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 11:24:31,337 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 11:24:31,337 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2021-05-06 11:24:31,337 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 13 26) the Hoare annotation is: true [2021-05-06 11:24:31,338 INFO L194 CegarLoopUtils]: At program point L18(lines 18 22) the Hoare annotation is: (let ((.cse0 (< (mod main_~x~0 4294967296) 99)) (.cse1 (* main_~x~0 (- 1)))) (or (and .cse0 (not (= (mod main_~y~0 2) 0)) (<= (div (+ .cse1 99) (- 4294967296)) 0) (or (= main_~x~0 1) (< 1 main_~x~0))) (= main_~x~0 0) (let ((.cse2 (div .cse1 (- 2)))) (and (<= (div (+ (* .cse2 (- 1)) 50) (- 2147483648)) 0) (< 0 .cse2) (= (mod main_~x~0 (- 2)) 0) .cse0)))) [2021-05-06 11:24:31,338 INFO L194 CegarLoopUtils]: At program point L18-2(lines 17 23) the Hoare annotation is: (let ((.cse1 (* main_~x~0 (- 1))) (.cse2 (= (mod main_~y~0 2) 0))) (or (and (or (= main_~x~0 2) (let ((.cse0 (div (+ .cse1 2) (- 2)))) (and (< 0 .cse0) (= (mod main_~x~0 (- 2)) 0) (<= (div (+ (* .cse0 (- 1)) 50) (- 2147483648)) 0)))) .cse2 (< (mod (+ main_~x~0 4294967294) 4294967296) 99)) (and (< (mod (+ main_~x~0 4294967295) 4294967296) 99) (or (= main_~x~0 1) (and (<= (div (+ .cse1 100) (- 4294967296)) 0) (< 1 main_~x~0))) (not .cse2)) (= main_~x~0 0))) [2021-05-06 11:24:31,338 INFO L194 CegarLoopUtils]: At program point L17-2(lines 17 23) the Hoare annotation is: (let ((.cse1 (* main_~x~0 (- 1))) (.cse2 (= (mod main_~y~0 2) 0))) (or (and (or (= main_~x~0 2) (let ((.cse0 (div (+ .cse1 2) (- 2)))) (and (< 0 .cse0) (= (mod main_~x~0 (- 2)) 0) (<= (div (+ (* .cse0 (- 1)) 50) (- 2147483648)) 0)))) .cse2 (< (mod (+ main_~x~0 4294967294) 4294967296) 99)) (and (<= (div (+ .cse1 100) (- 4294967296)) 0) (<= (+ (div main_~x~0 2) main_~y~0 (* 2147483648 (div (+ .cse1 99) (- 4294967296))) 49) (+ main_~x~0 (* 2 (div main_~y~0 2)))) (not .cse2) (< 1 main_~x~0)))) [2021-05-06 11:24:31,338 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 13 26) the Hoare annotation is: true [2021-05-06 11:24:31,338 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2021-05-06 11:24:31,338 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2021-05-06 11:24:31,338 INFO L194 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:24:31,338 INFO L194 CegarLoopUtils]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:24:31,338 INFO L201 CegarLoopUtils]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2021-05-06 11:24:31,338 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:24:31,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:24:31 BoogieIcfgContainer [2021-05-06 11:24:31,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:24:31,349 INFO L168 Benchmark]: Toolchain (without parser) took 2863.75 ms. Allocated memory was 207.6 MB in the beginning and 280.0 MB in the end (delta: 72.4 MB). Free memory was 173.0 MB in the beginning and 135.2 MB in the end (delta: 37.9 MB). Peak memory consumption was 110.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:31,349 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 207.6 MB. Free memory is still 189.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:24:31,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.15 ms. Allocated memory is still 207.6 MB. Free memory was 172.8 MB in the beginning and 163.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:31,350 INFO L168 Benchmark]: Boogie Preprocessor took 49.94 ms. Allocated memory is still 207.6 MB. Free memory was 163.5 MB in the beginning and 190.5 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:31,350 INFO L168 Benchmark]: RCFGBuilder took 255.59 ms. Allocated memory is still 207.6 MB. Free memory was 190.5 MB in the beginning and 177.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:31,351 INFO L168 Benchmark]: TraceAbstraction took 2363.20 ms. Allocated memory was 207.6 MB in the beginning and 280.0 MB in the end (delta: 72.4 MB). Free memory was 177.0 MB in the beginning and 135.2 MB in the end (delta: 41.8 MB). Peak memory consumption was 114.9 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:31,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 207.6 MB. Free memory is still 189.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 189.15 ms. Allocated memory is still 207.6 MB. Free memory was 172.8 MB in the beginning and 163.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.94 ms. Allocated memory is still 207.6 MB. Free memory was 163.5 MB in the beginning and 190.5 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.59 ms. Allocated memory is still 207.6 MB. Free memory was 190.5 MB in the beginning and 177.3 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2363.20 ms. Allocated memory was 207.6 MB in the beginning and 280.0 MB in the end (delta: 72.4 MB). Free memory was 177.0 MB in the beginning and 135.2 MB in the end (delta: 41.8 MB). Peak memory consumption was 114.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1936.5ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 8.7ms, AutomataDifference: 745.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 383.5ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42 SDtfs, 51 SDslu, 52 SDs, 0 SdLazy, 104 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 915.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 19 LocationsWithAnnotation, 49 PreInvPairs, 71 NumberOfFragments, 292 HoareAnnotationTreeSize, 49 FomulaSimplifications, 320 FormulaSimplificationTreeSizeReduction, 52.4ms HoareSimplificationTime, 19 FomulaSimplificationsInter, 497 FormulaSimplificationTreeSizeReductionInter, 323.7ms HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((x == 2 || ((0 < (x * -1 + 2) / -2 && x % -2 == 0) && ((x * -1 + 2) / -2 * -1 + 50) / -2147483648 <= 0)) && y % 2 == 0) && (x + 4294967294) % 4294967296 < 99) || (((x + 4294967295) % 4294967296 < 99 && (x == 1 || ((x * -1 + 100) / -4294967296 <= 0 && 1 < x))) && !(y % 2 == 0))) || x == 0 - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...